Work/Energy Theorem

45 J of work were done on the object that moved 5 meters. How much force was applied to the object?

• 8 N

• 225 N

• 9 N

• 0 N

Tags

NGSS.HS-PS2-1

A 10.0 kg box is accelerated from 2.0 m/s to 4.0 m/s. What is the amount of work needed to accelerate the box?

• 50 J

• 60 J

• 20 J

• 45 J

Tags

NGSS.HS-PS2-1

NGSS.HS-PS3-1

What are the units for Work?

• Newtons

• Kilograms

• Joules

• Moles

What is the equation for Kinetic Energy (KE)?

Tags

NGSS.HS-PS3-1

For an object sliding on the ground, the friction force

• always acts in the same direction as the displacement

• always acts in a direction perpendicular to the displacement

• always acts in a direction opposite to the displacement.

• acts either in the same direction as the displacement or in the

  direction opposite to the displacement depending on the value of the coefficient of kinetic friction.

Tags

NGSS.HS-PS2-1

Which of the following statements are true about potential energy?

• Both gravitational and elastic potential energy are dependent upon the speed of an object.

• Moving objects cannot have potential energy.

• None of these

• Potential energy is the energy stored in an object due to its position.

Tags

NGSS.MS-PS3-2

Which Equation matches:

"An object slides down a frictionless ramp."

• PE = KE

• W = PEel

• PE −W = KE

• W = PE

Tags

NGSS.HS-PS3-2

Which Equation matches:

"A moving object is stopped."

• PE = KE

• W = PEel

• PE −W = KE

• KE −W = 0

Tags

NGSS.HS-PS3-1

What is the ΔKE of a baseball hit with a force of 6000 N that travels 120 m across the field?

• 6000J

• 43560000J

• 720000J

• 50J

Tags

NGSS.HS-PS3-1