Four balls are thrown off the top of a building 27 m high.All balls are thrown with identical speeds,but at different angles.Ball 1 is thrown straight upward.Ball 2 is thrown straight downward.Ball 3 is thrown at an angle of +45S1U1P1$\circ$S1S1P0 relative to the horizontal.And Ball 4 is thrown at an angle of -45S1U1P1$\circ$S1S1P0 relative to the horizontal.Which ball has the greatest kinetic energy when it hits the ground?

A) ball 1 B) ball 2 C) ball 3 D) ball 4 E) All have the same kinetic energy A) ball 1 B) ball 2 C) ball 3 D) ball 4 E) All have the same kinetic energy

A 1210-kg car travels 1.20 km up an incline at constant velocity.The incline is 15S1U1P1$\circ$S1S1P0 measured with respect to the horizontal.The change in the car's potential energy is

A) 3.68 MJ. B) 3.68 KJ. C) 1.92 MJ. D) 1.92 KJ. E) 4.37 J. A) 3.68 MJ. B) 3.68 KJ. C) 1.92 MJ. D) 1.92 KJ. E) 4.37 J.

Four balls are thrown off the top of a building 27 m high.All balls are thrown with identical speeds,but at different angles.Ball 1 is thrown straight upward.Ball 2 is thrown straight downward.Ball 3 is thrown at an angle of +45S1U1P1$\circ$S1S1P0 relative to the horizontal.And Ball 4 is thrown at an angle of -45S1U1P1$\circ$S1S1P0 relative to the horizontal.Which ball has the highest speed when it hits the ground?

A) ball 1 B) ball 2 C) ball 3 D) ball 4 E) All hit with the same speed. A) ball 1 B) ball 2 C) ball 3 D) ball 4 E) All hit with the same speed.

A 5-kg block of ice travels with a speed of 12 m/s when it hits a 25S1U1P1$\circ$S1S1P0 incline plane.How far does it travel frictionlessly up the plane?

A) 12.3 m B) 7.3 m C) 5.6 m D) 13.7 m E) 17.4 m A) 12.3 m B) 7.3 m C) 5.6 m D) 13.7 m E) 17.4 m

An object is attached to a string that is 2.00 m long as shown below.The object is pulled back such that the string makes an angle of 30.0S1U1P1$\circ$S1S1P0 with respect to the vertical.The object is held still then released.What is the speed of the object at its lowest point?

A) 2.29 m/s B) 3.59 m/s C) 5.67 m/s D) 7.94 m/s E) 9.87 m/s A) 2.29 m/s B) 3.59 m/s C) 5.67 m/s D) 7.94 m/s E) 9.87 m/s

Exam 6: Potential Energy and Energy Conservation

Four balls are thrown off the top of a building 27 m high.All balls are thrown with identical speeds,but at different angles.Ball 1 is thrown straight upward.Ball 2 is thrown straight downward.Ball 3 is thrown at an angle of +45^$\circ$ relative to the horizontal.And Ball 4 is thrown at an angle of -45^$\circ$ relative to the horizontal.Which ball has the greatest kinetic energy when it hits the ground?

(Multiple Choice)

4.9/5

(73)

Question 61

A 1210-kg car travels 1.20 km up an incline at constant velocity.The incline is 15^$\circ$ measured with respect to the horizontal.The change in the car's potential energy is

(Multiple Choice)

4.8/5

(81)

Question 62

A 5.0-kg block slides a distance of 4.0 m down a rough inclined plane.The inclined plane makes an angle $\theta$ = 30^$\circ$ with respect to the horizontal.If the block had an initial velocity of 2.0 m/s down the inclined plane and a final velocity of 6.0 m/s down the inclined plane,how much energy was lost by the block due to the work done by friction?

(Multiple Choice)

4.7/5

(99)

Question 63

A block of mass 1.40 kg is attached to a spring and sits on a frictionless table which is a height h=4.0 m above the floor.The spring is compressed by d=0.11 m initially.If the spring constant is k = 600 N/m,what is the speed of the block when it leaves the spring?

(Multiple Choice)

4.7/5

(69)

Question 64

A slingshot is used to launch a 5.00-gram rock.The effective spring constant of the slingshot is 200 N/m.By what distance must the slingshot be stretched in order to launch the rock at 20.0 m/s?

(Multiple Choice)

4.7/5

(79)

Question 65

A person standing on top of a 40-m high cliff throws a rock with a mass of 0.25 kg off the cliff.The rock leaves the person's hand with a speed of 11 m/s and makes an angle of 75 degrees above the horizontal.What is the speed of the rock when it hits the ground at the bottom of the cliff?

(Multiple Choice)

4.7/5

(69)

Question 66

A 500-g book is resting on top of a shelf 1 m above the floor.The book is 10 cm from the edge of the shelf.Accidentally the book is pushed off the shelf with a force of 25 N and falls to the floor following a parabolic trajectory coming to rest a horizontal distance of 20 cm from the edge of the shelf.If the coefficient of kinetic friction between the book and the shelf is 0.3,how much net work is done on the book?

(Multiple Choice)

4.9/5

(85)

Question 67

In figure,the 2-kg mass has an initial velocity of 1 m/s down the ramp when it is 4 m up from the tip of a spring along a 30-degree ramp.The coefficient of kinetic friction between the ramp and the mass is 0.2.The spring at the bottom of the ramp is 200 cm long and has a spring constant of 100 N/m.What is the maximum compression the spring will have when the mass collides with it?

(Multiple Choice)

4.8/5

(81)

Question 68

Four balls are thrown off the top of a building 27 m high.All balls are thrown with identical speeds,but at different angles.Ball 1 is thrown straight upward.Ball 2 is thrown straight downward.Ball 3 is thrown at an angle of +45^$\circ$ relative to the horizontal.And Ball 4 is thrown at an angle of -45^$\circ$ relative to the horizontal.Which ball has the highest speed when it hits the ground?

(Multiple Choice)

4.8/5

(73)

Question 69

A 5-kg block of ice travels with a speed of 12 m/s when it hits a 25^$\circ$ incline plane.How far does it travel frictionlessly up the plane?

(Multiple Choice)

4.9/5

(77)

Question 70

The turning points for a 0.25-kg object in a potential of $The turning points for a 0.25-kg object in a potential of are \pm 0.50 m .What is the maximum potential energy of this object?$ are $\pm$ 0.50 m .What is the maximum potential energy of this object?

(Multiple Choice)

4.9/5

(82)

Question 71

An object is attached to a string that is 2.00 m long as shown below.The object is pulled back such that the string makes an angle of 30.0^$\circ$ with respect to the vertical.The object is held still then released.What is the speed of the object at its lowest point? $An object is attached to a string that is 2.00 m long as shown below.The object is pulled back such that the string makes an angle of 30.0<sup> \circ </sup> with respect to the vertical.The object is held still then released.What is the speed of the object at its lowest point?$

(Multiple Choice)

4.9/5

(75)

Question 72

When Neil Armstrong climbed down to the surface of the Moon via the 3.5-m tall ladder of the Lunar Lander,his potential energy changed by 1260 J.If his mass was 79 kg,what was the mass of his suit? The acceleration due to gravity on the moon is 1.62 m/s².

(Multiple Choice)

4.9/5

(69)

Question 73

A 3-kg block slides down a smooth incline of length 2 m inclined at 30^$\circ$ and hits a level,horizontal rough patch,coming to a stop in 1 m.What is the coefficient of friction between the block and the rough patch?

(Multiple Choice)

4.8/5

(66)

Question 74

An object heads towards a hill sliding without friction.If its initial velocity is 23 m/s,and its mass 111 kg how far up the hill h in m does it go?

(Multiple Choice)

4.8/5

(86)

Question 75

A person standing on top of a 40-m high cliff throws a rock with a mass of 0.25 kg off the cliff.The rock leaves the person's hand with a speed of 11 m/s and makes an angle of 75 degrees above the horizontal.What is the kinetic of the rock when it hits the ground at the bottom of the cliff?

(Multiple Choice)

4.9/5

(90)

Question 76

Find the turning points for a 0.25-kg object in a potential of if its maximum kinetic energy is 5.0 J.

(Multiple Choice)

4.8/5

(81)

Question 77

An object is sliding on a horizontal surface.The coefficient of kinetic friction between the object and the surface is 0.250.If the object has an initial velocity of 45.0 m/s,how far will the object travel before it stops?

(Multiple Choice)

4.9/5

(84)

Question 78

An ideal spring with a spring constant of 3000 N/m is attached at the bottom of a rough inclined plane that makes an angle of 37 degrees with the horizontal.The spring is compressed a distance of 80 cm and then a 12-kg box is placed on the spring.The coefficient of kinetic friction between the box and the inclined plane is 0.2.If the box is released from rest and is not attached to the spring,how fast will the box be traveling after sliding 4 m up the incline (3.2 m beyond the uncompressed length of the spring)?

(Multiple Choice)

4.8/5

(81)

Question 79

Showing 61 - 79 of 79

Exam 6: Potential Energy and Energy Conservation

A 1210-kg car travels 1.20 km up an incline at constant velocity.The incline is 15 ∘\circ∘ measured with respect to the horizontal.The change in the car's potential energy is

A block of mass 1.40 kg is attached to a spring and sits on a frictionless table which is a height h=4.0 m above the floor.The spring is compressed by d=0.11 m initially.If the spring constant is k = 600 N/m,what is the speed of the block when it leaves the spring?

A slingshot is used to launch a 5.00-gram rock.The effective spring constant of the slingshot is 200 N/m.By what distance must the slingshot be stretched in order to launch the rock at 20.0 m/s?

A person standing on top of a 40-m high cliff throws a rock with a mass of 0.25 kg off the cliff.The rock leaves the person's hand with a speed of 11 m/s and makes an angle of 75 degrees above the horizontal.What is the speed of the rock when it hits the ground at the bottom of the cliff?

A 5-kg block of ice travels with a speed of 12 m/s when it hits a 25 ∘\circ∘ incline plane.How far does it travel frictionlessly up the plane?

The turning points for a 0.25-kg object in a potential of are ±\pm± 0.50 m .What is the maximum potential energy of this object?

An object is attached to a string that is 2.00 m long as shown below.The object is pulled back such that the string makes an angle of 30.0 ∘\circ∘ with respect to the vertical.The object is held still then released.What is the speed of the object at its lowest point?

When Neil Armstrong climbed down to the surface of the Moon via the 3.5-m tall ladder of the Lunar Lander,his potential energy changed by 1260 J.If his mass was 79 kg,what was the mass of his suit? The acceleration due to gravity on the moon is 1.62 m/s2.

A 3-kg block slides down a smooth incline of length 2 m inclined at 30 ∘\circ∘ and hits a level,horizontal rough patch,coming to a stop in 1 m.What is the coefficient of friction between the block and the rough patch?

An object heads towards a hill sliding without friction.If its initial velocity is 23 m/s,and its mass 111 kg how far up the hill h in m does it go?

A person standing on top of a 40-m high cliff throws a rock with a mass of 0.25 kg off the cliff.The rock leaves the person's hand with a speed of 11 m/s and makes an angle of 75 degrees above the horizontal.What is the kinetic of the rock when it hits the ground at the bottom of the cliff?

Find the turning points for a 0.25-kg object in a potential of if its maximum kinetic energy is 5.0 J.

An object is sliding on a horizontal surface.The coefficient of kinetic friction between the object and the surface is 0.250.If the object has an initial velocity of 45.0 m/s,how far will the object travel before it stops?

Overview

Motion in a Straight Line

Motion in Two and Three Dimensions

Force

Kinetic Energy, work, and Power

Momentum and Collisions

Systems of Particles and Extended Objects

Circular Motion

Rotation

Static Equilibrium

Gravitation

Solids and Fluids

Oscillations

Waves

Sound

Temperature

Heat and the First Law of Thermodynamics

Ideal Gases

The Second Law of Thermodynamics

Electrostatics

Electric Fields and Gausss Law

Electric Potential

Capacitors

Current and Resistance

Direct Current Circuits

Magnetism

Magnetic Fields of Moving Charges

Electromagnetic Induction

Alternating Current Circuits

Electromagnetic Waves

Geometric Optics

Lenses and Optical Instruments

Wave Optics

Relativity

Quantum Physics

Quantum Mechanics

Atomic Physics

Elementary Particle Physics

Nuclear Physics

Filters

A 1210-kg car travels 1.20 km up an incline at constant velocity.The incline is 15^$\circ$ measured with respect to the horizontal.The change in the car's potential energy is

A 5-kg block of ice travels with a speed of 12 m/s when it hits a 25^$\circ$ incline plane.How far does it travel frictionlessly up the plane?

The turning points for a 0.25-kg object in a potential of $The turning points for a 0.25-kg object in a potential of are \pm 0.50 m .What is the maximum potential energy of this object?$ are $\pm$ 0.50 m .What is the maximum potential energy of this object?

When Neil Armstrong climbed down to the surface of the Moon via the 3.5-m tall ladder of the Lunar Lander,his potential energy changed by 1260 J.If his mass was 79 kg,what was the mass of his suit? The acceleration due to gravity on the moon is 1.62 m/s².

A 3-kg block slides down a smooth incline of length 2 m inclined at 30^$\circ$ and hits a level,horizontal rough patch,coming to a stop in 1 m.What is the coefficient of friction between the block and the rough patch?