Where does the energy go when things collide?

Question 1

True or false? Rubbing and hitting can make surfaces warm up.

• A. True
• B. False

Question 2

Why do cars have crumple zones that squash in a crash?

• A. To make the car lighter.
• B. To make more noise.
• C. To speed the car up.
• D. Squashing the car's front takes in energy so less reaches the passengers.

Question 3

Which energy transfer does this example mainly show: a bowling ball knocking pins flying?

• A. sound
• B. heat
• C. motion of another object

Question 4

True or false? Some energy in a collision is transferred as sound.

• A. True
• B. False

Question 5

Why does a bouncing ball bounce a little lower each time?

• A. The floor gets taller.
• B. Each bounce transfers some energy into sound and heat.
• C. Gravity gets stronger.
• D. The ball gets heavier.

Question 6

Which energy transfer does this example mainly show: brake pads getting hot?

• A. sound
• B. heat
• C. motion of another object

Question 7

True or false? Some energy in a collision is transferred as sound.

• A. True
• B. False

Question 8

Two toy cars crash. You hear a bang and the bumpers get slightly warm. Where did some of the motion energy go?

• A. it was destroyed
• B. into the air as wind
• C. into light only
• D. into sound and heat

Question 9

Which energy transfer does this example mainly show: brake pads getting hot?

• A. sound
• B. heat
• C. motion of another object

Question 10

True or false? A crash makes new energy.

• A. True
• B. False

Question 11

Why do cars have crumple zones that squash in a crash?

• A. To make the car lighter.
• B. To make more noise.
• C. To speed the car up.
• D. Squashing the car's front takes in energy so less reaches the passengers.

Question 12

Which energy transfer does this example mainly show: a hammer and nail getting warm after hammering?

• A. sound
• B. heat
• C. motion of another object

Question 13

True or false? Energy is destroyed in a crash.

• A. True
• B. False

Question 14

A moving snooker ball hits a still one head-on. The first stops and the second rolls away. What happened to the energy?

• A. It vanished.
• B. It was transferred from the first ball to the second.
• C. The second ball made new energy.
• D. It went back into the cue.

Question 15

Which energy transfer does this example mainly show: your hands warming after clapping hard?

• A. sound
• B. heat
• C. motion of another object

Question 16

True or false? Rubbing and hitting can make surfaces warm up.

• A. True
• B. False