Honor's WPE Test Review

Which does not illustrate kinetic energy?

• It is expressed in Joule.

• It depends upon the objects’ mass and speed.

• It is the energy an object possesses due to its motion.

• It depends upon the objects’ mass and objects’ height.

A roller coaster whose average speed throughout the ride is 32 m/s is at the top of a 72m hill and weighs 966N. If the coaster is moving close to 0 m/s at the top of the hill, the coaster car has ___________________ energy.

• only kinetic energy

• only potential energy

• mostly kinetic energy

• both kinetic and potential energy

What is the potential energy of a 3kg ball that is on the ground?

• 0 J

• 3 J

• 9.8 J

• 29.4 J

A 100 N force is applied to move an object a horizontal distance of 5 meters at constant speed in 10 seconds. How much power is done?

• 50J

• 50W

• 500J

• 500W

A weightlifter holds a 100 kg barbell above her head. Is work being done?

• Yes because there is a force applied to the barbell and the force causes a displacement of the barbell.

• Yes because there is an upward force applied to the barbell and the barbell moves vertically.

• No because no displacement is occurring.

• No because there is no force applied.

What is the energy possessed by the cart?

• potential energy

• kinetic energy

• mostly potential

• mostly kinetic

If the mass of the cart is 15kg, how much is the potential energy of the cart?

• 0J

• 1.2J

• 6J

• 58.8J

How will you describe the energy from Point A to Point B?

• mostly potential energy

• mostly kinetic energy

• losing PE, gaining KE

• losing KE, gaining PE

What is the total mechanical energy of the object?

• 100J

• 75J

• 50J

• 25J

In physics, we define work as this

• force x time
• force x distance
• force / time
• force / distance