A horizontal force of 200 N is applied to a 55-kg cart across a 10 m level surface.If the cart accelerates at 3.0 m/s2,then what is the work done by the force of friction as it acts to retard the motion of the cart?

A) −900 J B) −175 J C) −350 J D) −700 J A) −900 J B) −175 J C) −350 J D) −700 J

Exam 6: Momentum and Collisions: Part A

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A satellite is held in orbit by a 3000-N gravitational force.Each time the satellite completes an orbit of circumference 80,000 km,the work done on it by gravity is:

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Question 21

An automobile delivers 30.0 hp to its wheels when moving at a constant speed of 26.0 m/s.What is the resistance force on the automobile at this speed? (1 hp = 746 watts)

(Multiple Choice)

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Question 22

Yuri,a Russian weightlifter,is able to lift 300 kg a distance 2.00 m in 2.00 s.What is his power output?

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Question 23

The net force acting on a 12.6-kg object is given by F_x = (8 - x)N,where F_x is in newtons and x is in meters.How much work is done on the object as it moves from x = 0 to x = 6 m?

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Question 24

A parachutist of mass 50.0 kg jumps out of an airplane at a height of 800 m.The parachute deploys,and she lands on the ground with a speed of 5.0 m/s.How much energy was lost to air friction during this jump?

(Multiple Choice)

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Question 25

What is the kinetic energy of a 0.160-kg ball thrown at 40.0 m/s (90.0 mph)?

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Question 26

A 2.00-kg ball has zero potential and kinetic energy.Maria drops the ball into a 20.0-m deep well.After the ball comes to a stop in the mud,the sum of its potential and kinetic energy is:

(Multiple Choice)

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Question 27

A pole-vaulter clears 5.00 m.With what speed does he strike the mat in the landing area?

(Multiple Choice)

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Question 28

A horizontal force of 100 N is applied to move a 45-kg cart across a 5.0-m level surface.What work is done by the 100-N force?

(Multiple Choice)

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Question 29

A Hooke's law spring is compressed 12.0 cm from equilibrium and the potential energy stored is 36.0 J.What is the spring constant in this case?

(Multiple Choice)

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Question 30

A 400-hp engine can deliver,in SI units,an average power of _____.(1 hp = 746 W)

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Question 31

How fast would a 1000-kg car be traveling if it had a kinetic energy equal to 1000 Calories?

(Multiple Choice)

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Question 32

A hill is 200 m long and makes an angle of 12° with the horizontal.As a 50-kg jogger runs up the hill,how much work does gravity do on the jogger?

(Multiple Choice)

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Question 33

In 1908 there was a huge explosion referred to as the Tunguska event which occurred in Siberia.Apparently this was caused by a very large meteorite,a small asteroid,or a comet colliding with the Earth.If the energy released,estimated at 5 × 10¹⁶ J,were from the kinetic energy of the object,what would have been its approximate mass if its speed had been 10⁴ m/s?

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Question 34

A Hooke's law spring is compressed 12.0 cm from equilibrium,and the potential energy stored is 36.0 J.What compression (as measured from equilibrium)would result in 100 J being stored in this case?

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Question 35

A professional skier reaches a speed of 39.6 m/s on a 30° ski slope.Ignoring friction,what was the minimum distance along the slope the skier would have had to travel,starting from rest?

(Multiple Choice)

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Question 36

A horizontal force of 200 N is applied to a 55-kg cart across a 10 m level surface.If the cart accelerates at 3.0 m/s²,then what is the work done by the force of friction as it acts to retard the motion of the cart?

(Multiple Choice)

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Question 37

What is the minimum amount of energy required for a 70.0-kg climber carrying a 20.0-kg pack to climb Mt.Everest,which is 8850 m high?

(Multiple Choice)

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Question 38

A 66-kg woman runs up a flight of stairs having a rise of 4.0 m in a time of 4.2 s.What average power did she supply?

(Multiple Choice)

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Question 39

Which of the following is not true about potential energy?

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Question 40

Showing 21 - 40 of 61

Exam 6: Momentum and Collisions: Part A

A satellite is held in orbit by a 3000-N gravitational force.Each time the satellite completes an orbit of circumference 80,000 km,the work done on it by gravity is:

An automobile delivers 30.0 hp to its wheels when moving at a constant speed of 26.0 m/s.What is the resistance force on the automobile at this speed? (1 hp = 746 watts)

Yuri,a Russian weightlifter,is able to lift 300 kg a distance 2.00 m in 2.00 s.What is his power output?

The net force acting on a 12.6-kg object is given by Fx = (8 - x)N,where Fx is in newtons and x is in meters.How much work is done on the object as it moves from x = 0 to x = 6 m?

A parachutist of mass 50.0 kg jumps out of an airplane at a height of 800 m.The parachute deploys,and she lands on the ground with a speed of 5.0 m/s.How much energy was lost to air friction during this jump?

What is the kinetic energy of a 0.160-kg ball thrown at 40.0 m/s (90.0 mph)?

A 2.00-kg ball has zero potential and kinetic energy.Maria drops the ball into a 20.0-m deep well.After the ball comes to a stop in the mud,the sum of its potential and kinetic energy is:

A pole-vaulter clears 5.00 m.With what speed does he strike the mat in the landing area?

A horizontal force of 100 N is applied to move a 45-kg cart across a 5.0-m level surface.What work is done by the 100-N force?

A Hooke's law spring is compressed 12.0 cm from equilibrium and the potential energy stored is 36.0 J.What is the spring constant in this case?

A 400-hp engine can deliver,in SI units,an average power of _____.(1 hp = 746 W)

How fast would a 1000-kg car be traveling if it had a kinetic energy equal to 1000 Calories?

A hill is 200 m long and makes an angle of 12° with the horizontal.As a 50-kg jogger runs up the hill,how much work does gravity do on the jogger?

A Hooke's law spring is compressed 12.0 cm from equilibrium,and the potential energy stored is 36.0 J.What compression (as measured from equilibrium)would result in 100 J being stored in this case?

A professional skier reaches a speed of 39.6 m/s on a 30° ski slope.Ignoring friction,what was the minimum distance along the slope the skier would have had to travel,starting from rest?

A horizontal force of 200 N is applied to a 55-kg cart across a 10 m level surface.If the cart accelerates at 3.0 m/s2,then what is the work done by the force of friction as it acts to retard the motion of the cart?

What is the minimum amount of energy required for a 70.0-kg climber carrying a 20.0-kg pack to climb Mt.Everest,which is 8850 m high?

A 66-kg woman runs up a flight of stairs having a rise of 4.0 m in a time of 4.2 s.What average power did she supply?

Which of the following is not true about potential energy?

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

The Laws of Motion: Part A

Energy

Energy: Part A

Momentum and Collisions

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

The net force acting on a 12.6-kg object is given by F_x = (8 - x)N,where F_x is in newtons and x is in meters.How much work is done on the object as it moves from x = 0 to x = 6 m?

A horizontal force of 200 N is applied to a 55-kg cart across a 10 m level surface.If the cart accelerates at 3.0 m/s²,then what is the work done by the force of friction as it acts to retard the motion of the cart?