A stone is thrown with an initial speed of 15 m/s at an angle of 53° above the horizontal from the top of a 40-m building.If g = 9.8 m/s2 and air resistance is negligible,then what is the magnitude of the vertical velocity component of the rock as it hits the ground?

A) 30 m/s B) 24 m/s C) 26 m/s D) 29 m/s A) 30 m/s B) 24 m/s C) 26 m/s D) 29 m/s

Exam 4: The Laws of Motion: Part A

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A 15-kg block rests on a level,frictionless surface and is attached by a light string to a 10-kg hanging mass where the string passes over a massless frictionless pulley.If g = 9.8 m/s²,what is the tension in the connecting string?

(Multiple Choice)

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Question 41

Jamal pulls a 150-N sled up a 28.0° slope at constant speed by a force of 120 N.Near the top of the hill he releases the sled.With what acceleration does the sled go down the hill?

(Multiple Choice)

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Question 42

The accelerating force of the wind on a small 250-kg sailboat is 707 N northeast.If the drag of the keel is 500 N acting west,what is the acceleration of the boat?

(Multiple Choice)

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Question 43

A 9.0-kg hanging weight is connected by a string over a pulley to a 5.0-kg block sliding on a flat table.If the coefficient of sliding friction is 0.10,find the tension in the string.

(Multiple Choice)

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Question 44

A fireman,40.0 m away from a burning building,directs a stream of water from a fire hose at an angle of 30.0° above the horizontal.If the initial speed of the stream is 40.0 m/s,at what height above the nozzle will the stream of water strike the building?

(Multiple Choice)

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Question 45

John throws a baseball from the outfield from shoulder height,at an initial velocity of 39.2 m/s at an initial angle of 30.0° with respect to the horizontal.The ball is in its trajectory for a total interval of 4.00 s before the third baseman catches it at an equal shoulder-height level.(Assume air resistance is negligible. )What is the ball's horizontal displacement?

(Multiple Choice)

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Question 46

Plane A is flying at 600 mph in the northeast direction relative to the Earth.Plane B is flying at 500 mph in the north direction relative to the Earth.What is the speed of Plane B as observed from Plane A?

(Multiple Choice)

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Question 47

A 10-kg mass and a 6.0-kg mass are connected by a light string over a massless,frictionless pulley.If g = 9.8 m/s²,what is the acceleration of the system when released?

(Multiple Choice)

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Question 48

Plane A is flying at 600 mph in the northeast direction relative to the Earth.Plane B is flying at 500 mph in the north direction relative to the Earth.What is the direction of motion of Plane B as observed from Plane A?

(Multiple Choice)

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Question 49

Wiley Coyote has missed the elusive Road Runner once again.This time,he leaves the edge of the cliff at 40.0 m/s horizontal velocity.If the canyon is 100 m deep,how far from his starting point on the edge of the cliff does the coyote land?

(Multiple Choice)

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Question 50

A projectile is launched at an angle less than 30° and at speed v.Which will increase the projectile's range more,ignoring atmospheric drag?

(Multiple Choice)

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Question 51

Two baseballs are released at the same time.One is dropped from rest and the other is given an initial horizontal velocity.Which of the following is not true? Ignore atmospheric drag.

(Multiple Choice)

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Question 52

A 500-N tightrope walker stands at the center of the rope such that each half of the rope makes an angle of 15.0° with the horizontal.What is the tension in the rope?

(Multiple Choice)

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Question 53

A plane is moving due north,directly towards its destination.Its airspeed is 200 mph.A constant breeze is blowing from west to east at 42 mph.In which direction is the plane pointed?

(Multiple Choice)

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Question 54

A stone is thrown with an initial speed of 15 m/s at an angle of 53° above the horizontal from the top of a 40-m building.If g = 9.8 m/s² and air resistance is negligible,then what is the magnitude of the vertical velocity component of the rock as it hits the ground?

(Multiple Choice)

4.7/5

(85)

Question 55

A boat travels upstream and after one hour has gone 10 km.The boat next travels downstream and after one hour has gone 16 km.If the boat's speed relative to the water is constant,what is the speed of the current in the river?

(Multiple Choice)

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Question 56

A sled weighs 100 N.It is held in place on a frictionless 30° slope by a rope attached to a stake at the top;the rope is parallel to the slope.What is the normal force acting on the sled?

(Multiple Choice)

5.0/5

(78)

Question 57

A trapeze artist,with swing,weighs 700 N;he is momentarily held to one side by his partner so that the swing ropes make an angle of 30.0° with the vertical.In such a condition of static equilibrium,what is the horizontal force being applied by the partner?

(Multiple Choice)

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Question 58

A river flows due east at 2.0 m/s.A boat crosses the 300 m-wide river by maintaining a constant velocity of 10 m/s due north relative to the water.If no correction is made for the current,how far downstream does the boat move by the time it reaches the far shore?

(Multiple Choice)

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Question 59

A ball is rolled horizontally off a table with an initial speed of 0.18 m/s.A stopwatch measures the ball's trajectory time from table to the floor to be 0.30 s.What is the height of the table? Note: g = 9.8 m/s² and air resistance is negligible.

(Multiple Choice)

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Question 60

Showing 41 - 60 of 69

Exam 4: The Laws of Motion: Part A

A 15-kg block rests on a level,frictionless surface and is attached by a light string to a 10-kg hanging mass where the string passes over a massless frictionless pulley.If g = 9.8 m/s2,what is the tension in the connecting string?

Jamal pulls a 150-N sled up a 28.0° slope at constant speed by a force of 120 N.Near the top of the hill he releases the sled.With what acceleration does the sled go down the hill?

The accelerating force of the wind on a small 250-kg sailboat is 707 N northeast.If the drag of the keel is 500 N acting west,what is the acceleration of the boat?

A 9.0-kg hanging weight is connected by a string over a pulley to a 5.0-kg block sliding on a flat table.If the coefficient of sliding friction is 0.10,find the tension in the string.

A fireman,40.0 m away from a burning building,directs a stream of water from a fire hose at an angle of 30.0° above the horizontal.If the initial speed of the stream is 40.0 m/s,at what height above the nozzle will the stream of water strike the building?

Plane A is flying at 600 mph in the northeast direction relative to the Earth.Plane B is flying at 500 mph in the north direction relative to the Earth.What is the speed of Plane B as observed from Plane A?

A 10-kg mass and a 6.0-kg mass are connected by a light string over a massless,frictionless pulley.If g = 9.8 m/s2,what is the acceleration of the system when released?

Plane A is flying at 600 mph in the northeast direction relative to the Earth.Plane B is flying at 500 mph in the north direction relative to the Earth.What is the direction of motion of Plane B as observed from Plane A?

Wiley Coyote has missed the elusive Road Runner once again.This time,he leaves the edge of the cliff at 40.0 m/s horizontal velocity.If the canyon is 100 m deep,how far from his starting point on the edge of the cliff does the coyote land?

A projectile is launched at an angle less than 30° and at speed v.Which will increase the projectile's range more,ignoring atmospheric drag?

Two baseballs are released at the same time.One is dropped from rest and the other is given an initial horizontal velocity.Which of the following is not true? Ignore atmospheric drag.

A 500-N tightrope walker stands at the center of the rope such that each half of the rope makes an angle of 15.0° with the horizontal.What is the tension in the rope?

A plane is moving due north,directly towards its destination.Its airspeed is 200 mph.A constant breeze is blowing from west to east at 42 mph.In which direction is the plane pointed?

A stone is thrown with an initial speed of 15 m/s at an angle of 53° above the horizontal from the top of a 40-m building.If g = 9.8 m/s2 and air resistance is negligible,then what is the magnitude of the vertical velocity component of the rock as it hits the ground?

A boat travels upstream and after one hour has gone 10 km.The boat next travels downstream and after one hour has gone 16 km.If the boat's speed relative to the water is constant,what is the speed of the current in the river?

A sled weighs 100 N.It is held in place on a frictionless 30° slope by a rope attached to a stake at the top;the rope is parallel to the slope.What is the normal force acting on the sled?

A trapeze artist,with swing,weighs 700 N;he is momentarily held to one side by his partner so that the swing ropes make an angle of 30.0° with the vertical.In such a condition of static equilibrium,what is the horizontal force being applied by the partner?

A river flows due east at 2.0 m/s.A boat crosses the 300 m-wide river by maintaining a constant velocity of 10 m/s due north relative to the water.If no correction is made for the current,how far downstream does the boat move by the time it reaches the far shore?

A ball is rolled horizontally off a table with an initial speed of 0.18 m/s.A stopwatch measures the ball's trajectory time from table to the floor to be 0.30 s.What is the height of the table? Note: g = 9.8 m/s2 and air resistance is negligible.

Introduction

Introduction: Part A

Motion in One Dimension

Motion in One Dimension: Part A

Vectors and Two-Dimensional Motion

Vectors and Two-Dimensional Motion: Part A

The Laws of Motion

Energy

Energy: Part A

Momentum and Collisions

Momentum and Collisions: Part A

Rotational Motion and the Law of Gravity

Rotational Motion and the Law of Gravity: Part A

Rotational Equilibrium and Rotational Dynamics

Rotational Equilibrium and Rotational Dynamics: Part A

Solids and Fluids

Solids and Fluids: Part A

Thermal Physics

Thermal Physics: Part A

Energy in Thermal Processes Heat and Internal Energy

Energy in Thermal Processes Heat and Internal Energy: Part A

The Laws of Thermodynamics Work in Thermodynamic Processes

The Laws of Thermodynamics Work in Thermodynamic Processes: Part A

Vibrations and Waves

Vibrations and Waves: Part A

Sound

Sound: Part A

Electric Forces and Electric Fields

Electric Forces and Electric Fields: Part A

Electrical Energy and Capacitance

Electrical Energy and Capacitance: Part A

Current and Resistance Electric Current

Current and Resistance Electric Current: Part A

Direct-Current Circuits Sources of EMF

Direct-Current Circuits Sources of EMF: Part A

Magnetism Magnets

Magnetism Magnets: Part A

Induced Voltages and Inductance

Induced Voltages and Inductance: Part A

Alternating-Current Circuits and Electromagnetic Waves

Alternating-Current Circuits and Electromagnetic Waves: Part A

Reflection and Refraction of Light

Reflection and Refraction of Light: Part A

Mirrors and Lenses

Mirrors and Lenses: Part A

Wave Optics

Wave Optics: Part A

Optical Instruments

Optical Instruments: Part A

Relativity

Relativity: Part A

Quantum Physics Blackbody Radiation and Plancks Hypothesis

Quantum Physics Blackbody Radiation and Plancks Hypothesis: Part A

Atomic Physics

Atomic Physics: Part A

Nuclear Physics

Nuclear Physics: Part A

Nuclear Energy and Elementary Particles

Nuclear Energy and Elementary Particles: Part A

Particle Collisions, Mediating Photons, and Quark Structures: Exploring the Fundamentals of Physics

A 15-kg block rests on a level,frictionless surface and is attached by a light string to a 10-kg hanging mass where the string passes over a massless frictionless pulley.If g = 9.8 m/s²,what is the tension in the connecting string?

A 10-kg mass and a 6.0-kg mass are connected by a light string over a massless,frictionless pulley.If g = 9.8 m/s²,what is the acceleration of the system when released?

A stone is thrown with an initial speed of 15 m/s at an angle of 53° above the horizontal from the top of a 40-m building.If g = 9.8 m/s² and air resistance is negligible,then what is the magnitude of the vertical velocity component of the rock as it hits the ground?

A ball is rolled horizontally off a table with an initial speed of 0.18 m/s.A stopwatch measures the ball's trajectory time from table to the floor to be 0.30 s.What is the height of the table? Note: g = 9.8 m/s² and air resistance is negligible.