Academic PES - Work, Energy, Power Quiz

Ms. Chishti pushes a box with a force of 25 N to the right. The box moves 5.0 m as a result. How much work did she do on the box?

• 12.5 Joules

• 125 Joules

• 50 Joules

• 5 Joules

Mr. Rosenwald does 1500 Joules of work in 3.0 seconds while lifting a barbell off the ground. What is his power output?

• 500 Watts

• 4500 Watts

• 75 Watts

• 750 Watts

In order for work to be done an object must have

• Mass

• Force

• Energy

• Displacement

The energy of motion is called

• Electrical Energy

• Chemical Energy

• Kinetic Energy

• Potential Energy

The energy due to an object's position is called

• Potential Energy

• Kinetic Energy

• Mechanical Energy

• Elastic Energy

Mr. Noble tosses a 1.0 kg ball up in the air. How much potential energy does the ball gain if it reaches 4.0 m high? (Choose the closest answer)

• 10 Joules

• 20 Joules

• 30 Joules

• 40 Joules

When a force (F) points in the opposite direction to the displacement ( $\Delta d$  ), the work done is 

• zero 

• positive

• negative

When a force (F) points perpendicular direction to the displacement ( $\Delta d$  ), the work done is 

• zero 

• positive

• negative

A 5.0 kg block has a kinetic energy of 40 Joules. What is the speed at which the block is moving?

• 2.0 m/s

• 4.0 m/s

• 8.0 m/s

• 6.0 m/s

How much kinetic energy does a 1000 kg car have if it is traveling at 5.0 m/s?

• 2500 J

• 25000 J

• 1250 J

• 12500 J