Understanding Acceleration

What is acceleration?

• A constant speed

• A change in speed

• A type of vehicle

• A type of energy

Which of the following is an example of acceleration?

• A person standing still

• A car parked in a garage

• A train moving at a constant speed

• A roller coaster slowing down as it climbs

What causes acceleration?

• Friction

• Inertia

• A force

• A vacuum

Why do objects fall faster as they approach the Earth's surface?

• Because the air resistance decreases

• Because they gain more mass

• Because they become heavier

• Because the pull of gravity becomes stronger

When a catcher catches a baseball, is the baseball accelerating?

• No, because it is in the air

• Yes, because it changes direction

• Yes, because it changes speed

• No, because it stops moving