IPS- 75% Summative: Energy- NRS

An object that has kinetic energy must be

• at rest
• in motion
• changing direction
• lifted to a height

How much force is required to lift a rock in a vertical direction of 8 m if 80 J of work were done?

• 10 W

• 10 N

• 80 N

• 80 W

When a ball is dropped it bounces until it eventually stops. Why does this happen?

• Some of the ball's energy is lost
• Some of the ball's energy is converted to other forms
• All of the ball's energy is eventually converted to potential energy when the ball stops bouncing
• All of the ball's energy is eventually converted to kinetic energy when the ball stops bouncing

Energy stored in food would be considered what

• kinetic
• chemical
• thermal
• nuclear

What is power measured in?

• joules
• watts
• newtons
• grams

A material that resists/ limits the flow of heat is called________

• conductor
• insulator
• radiator
• generator

An object has a velocity of 9 m/s and a mass of 20 kg. What is the kinetic energy of the object?

• 180 J

• 810 J

• 90 J

• 220 J

How long does it take to do 278 J of work with 17 W of power?

• 3.52 secs

• 16.35 secs

• 87.8 secs

• 25.93 secs

In the diagram to the right, a roller coaster car starts from rest and moves along the track. At which point does the roller coaster car have the greatest potential energy?

• A
• B
• C
• D

Which picture shows thermal energy transfer by CONVECTION?

• A
• D
• B
• C