Texas Science Chapter 5: Lesson 2 Speed and Mechanical Energy

What is speed a measure of?

• How heavy an object is

• How fast or slow an object moves

• How big an object is

• How much an object costs

What happens when a bowling ball moves faster?

• It becomes lighter

• It has more mechanical energy

• It changes color

• It makes no difference

Why might a fast-moving bowling ball knock down all 10 pins?

• Because it is heavier

• Because it has greater mechanical energy

• Because it is larger

• Because it is colorful

What tool can be used to measure the speed of an object?

• A ruler

• A thermometer

• A stopwatch

• A scale

What happens to the mechanical energy of a tool when you use it faster?

• It decreases

• It stays the same

• It increases

• It disappears

Who has the most mechanical energy when running across a field?

• The person who runs the slowest

• The person who runs the fastest

• The person who walks

• The person who stands still

What is the relationship between speed and mechanical energy?

• The slower the speed, the more mechanical energy

• The faster the speed, the more mechanical energy

• Speed does not affect mechanical energy

• Mechanical energy is only related to weight

What is the best way to tell the speed of an object?

• By guessing

• By using a stopwatch

• By looking at its color

• By feeling its weight

What happens to mechanical energy when Racine bikes to the end of the street first?

• Racine has the least mechanical energy

• Racine has the most mechanical energy

• Racine's mechanical energy stays the same

• Racine loses mechanical energy

What is an example of using mechanical energy in tools?

• Moving a saw slowly

• Twisting a screwdriver quickly

• Holding a hammer still

• Looking at a tool