Physics Quiz

Which of the following situations involves net work being performed?

• A cyclist maintains a constant speed on a flat road.

• A car is parked on a hill.

• A child slides down a slide with increasing speed.

• A book rests on a table without moving.

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

A person exerts a force of 50 N to pull a sled 5 meters across a frictionless surface at a constant speed. How much work is done? (Use the formula W = Fd)

• 250 J

• 300 J

• 350 J

• 400 J

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NGSS.MS-PS2-2

A 2 kg ball is held 5 meters above the ground. What is the gravitational potential energy of the ball? (Assume g = 9.8 m/s²) PE = mgh

• 49 J

• 98 J

• 196 J

• 490 J

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NGSS.MS-PS3-2

NGSS.MS-PS3-4

A 0.5 kg rock is thrown straight up with an initial kinetic energy of 50 J. What will be the kinetic energy of the rock at its highest point? KE = 1/2 mv²

• 0 J

• 10 J

• 25 J

• 50 J

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

If a diver jumps off a 10 m platform, what type of energy transformation occurs as they fall?

• Kinetic to potential energy

• Potential to kinetic energy

• Chemical to kinetic energy

• Thermal to potential energy

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NGSS.MS-PS3-5

A diver with a mass of 60 kg stands on a platform 20 m above the water with an initial speed of 2 m/s. What is the total mechanical energy (TME) of the diver? (Use g = 9.8 m/s²) TME = ΣPE + KE

• 11,760 J

• 11,880 J

• 12,000 J

• 12,060 J

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NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A 10 kg object is 10 m above the ground and moving at a speed of 6 m/s. What is the total mechanical energy (TME) of the object? (Use g = 9.8 m/s²) TME = ΣPE + KE

• 980 J

• 1,000 J

• 1,160 J

• 1,200 J

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NGSS.MS-PS3-2

A renewable energy system stores 6,000 J of potential energy in a reservoir. If the system converts 3,000 J to kinetic energy, what is the total mechanical energy? TME = ΣPE + KE

• 6,000 J

• 4,000 J

• 2,000 J

• 9,000 J

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NGSS.MS-PS3-2

Which of the following is an example of elastic potential energy?

• A rock at the top of a hill

• A compressed spring

• A moving car

• A hot cup of coffee

A 2.0-kg book is initially at rest on a wooden table. The book is pushed with a constant force of 5.0 N. A frictional force of 2.0 N is exerted on the book by the table as it moves. Using the work-energy theorem, calculate the final velocity of the book after it has been pushed 1.5 meters across the table. W = ΔKE

• 1.6 m/s

• 2.1 m/s

• 2.7 m/s

• 3.3 m/s

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

NGSS.MS-PS3-5