Physics B Final Exam

What are the two types of Mechanical Energy? (ME)

• Kinetic and Potential Energy
• Kinetic and Nuclear Energy
• Potential and Chemical Energy
• Thermal and Kinetic Energy

Kinetic Energy is defined as

• Energy stored due to its location
• Energy of motion
• Energy stored in the bonds of molecules
• Heat energy

A 70 kg runner has a velocity of 5 m/s. Her kinetic energy is

• 875 J
• 175 J
• 1750 J
• 350 J

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

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

You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what is the ball's velocity?

• 6.32 m/s
• 40 m/s
• 4.47 m/s
• 100 m/s

What has to be true about an object for it to have kinetic energy?

• it must be moving

• it must be elevated

• it must be experiencing a net force

• it must be accelerating

When does an object have no kinetic energy?

• when it is at rest
• when it is moving very slowly
• when the only force that is acting on it is gravity
• when it has no electrical charge

What is an example of kinetic energy?

• Water moving down a waterfall

• A car parked in a driveway

• A baby waving its hands

• Both A and C

Which of the following has the MOST momentum?

• rolling ping-pong ball

• rolling bowling ball

• rolling soccer ball

• rolling basketball