AP Physics Unit 4 Review

A 5 kg ball is lifted 12 m above the ground. It's gravitational potential energy is

• 60 J
• 600 J
• 17 J
• 2.4 J

A person has a mass of 24 kg on Earth. What is the persons mass on the Moon (1/6 of Earth's gravity)?

• 24 kg
• 144 kg
• 6 kg
• 4 kg

Which of the following objects has the most kinetic energy?

• A 20 kg toddler running at 5 m/s
• A 50 kg toddler running at  30 m/s
• A 90 kg toddler running at 30 m/s
• A 100 kg  toddler running at 2 m/s

How do you find a resultant if there are components at a right angle to each other, and you know two sides?

• Multiply
• Divide
• Pythagorean Theorem
• sins or cosine

What is the correct equation to solve for x?

• tan (45) = x/13
• cos (45) = x/13
• sin (45) = 13/x
• sin (45) = x/13

A roller coaster car moves down the hill. Assuming that the track is frictionless, which option represents the transfer of energy?

• Potential to Kinetic

• Kinetic to Potential

• Mechanical to Thermal

• Mechanical to Potential

A spring with a spring constant of 3 N/m is compressed by 4 cm. How much potential energy is stored in the spring?

• 0.0024 J
• 0.024 J
• 2.4 J
• 24 J

The unit for energy and work is

• J

• N

• m/s

• m/s/s

Mechanical energy can be either potential or ________.

• Motion
• Kinetic
• Chemical
• Light

Which of the following is the best example of work being done?

• You lift a heavy box off the floor

• You stand still holding a heavy box

• Work is being done in both lifting and holding a heavy box

• No work is being done for either lifting nor holding a heavy box