Acceleration

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object. It can be positive (speeding up) or negative (slowing down).

Tags

NGSS.MS-PS2-2

Front

What does a negative acceleration indicate?

Back

A negative acceleration indicates that an object is slowing down.

Front

Can an object have acceleration if it is moving at a constant speed?

Back

No, acceleration occurs only when there is a change in velocity, which includes changes in speed or direction.

Front

What is the unit of acceleration?

Back

The unit of acceleration is meters per second squared (m/s²).

Tags

NGSS.HS-PS2-1

Front

If a car increases its speed from 20 m/s to 50 m/s in 10 seconds, what is its acceleration?

Back

Acceleration = (Final Velocity - Initial Velocity) / Time = (50 m/s - 20 m/s) / 10 s = 3 m/s².

Front

What happens to the acceleration of an object in free fall?

Back

In free fall, the object experiences constant acceleration due to gravity, approximately 9.81 m/s² downward.

Tags

NGSS.MS-PS2-4

Front

Is turning a corner while walking considered acceleration?

Back

Yes, turning a corner involves a change in direction, which means there is acceleration.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

Front

If a cyclist slows down from 15 m/s to 5 m/s in 5 seconds, what is the acceleration?

Back

Acceleration = (5 m/s - 15 m/s) / 5 s = -2 m/s² (negative indicates slowing down).

Front

What does it mean if an object has zero acceleration?

Back

Zero acceleration means that the object is either at rest or moving at a constant velocity.