Work Power PE KE CA4 review

The Gravitational Potential energy an object possess is dependent on....

(P.E. = mass x gravity x height)

• the object's position

• the object's speed

• the object's momentum

• the object's acceleration

What is the unit of measurement for Work, Potential Energy, and Kinetic Energy?

• Joule

• Meter

• m/s²

• Newton

What is the physics formula for Work?

• Work = Force x Distance

• Work = mass x acceleration

• Work = power/acceleration

• Work = distance/time

What is the Force a 40kg student exerts due to gravity?

(acceleration of gravity = 9.81 m/s² )

^{Force = mass x acceleration}

• 392 N

• 440 N

• 40 N

• 512 N

The same 40 kg student runs 5 meters up a flight of stairs, how much work have they done?

Force = mass x acceleration

(Work = Force x Distance)

• 1962 Joules

• 200 Joules

• 2000 Joules

• 981 Joules

If the same 40 kg student runs up 5 meters of stairs, and it takes them 7.0 seconds to do it, how much power have they generated?

Force = Mass x Acceleration

Work = Force x Distance

Power = Work/time

• 29 Watts

• 280 Watts

• 1400 Watts

• 14000 Watts

What is the physics formula for gravitational potential energy?

• P.E. = mass x gravity x height

• P.E. = 1/2 x mass x velocity²

• P.E. = force x distance

When a 5-kilogram mass is raised vertically 2 meters from the ground, what is its gain in potential energy?

• 0 J

• 10 J

• 20 J

• 100 J

Three people of equal mass climbed a mountain using paths A, B, and C shown in the diagram.

Which climber gained the greatest amount of gravitational potential energy from start to finish?

• A

• B

• C

• All gained equal amounts of potential energy

What is the change in potential energy when the box is lifted 4 meters

(P.E. = mgh)

Force = mg

• 4 J

• 2 J

• 8 J

• 12 J