Speed and Acceleration

Front

What is average speed?

Back

Average speed is the total distance traveled divided by the total time taken. It is a measure of how fast an object is moving on average over a period of time.

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, also known as deceleration).

Front

What is velocity?

Back

Velocity is the speed of an object in a specific direction. It is a vector quantity, meaning it has both magnitude and direction.

Front

What is negative acceleration?

Back

Negative acceleration, or deceleration, occurs when an object slows down. It is represented by a decrease in speed over time.

Front

How do you calculate acceleration?

Back

Acceleration can be calculated using the formula: a = (final velocity - initial velocity) / time.

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

What is an example of constant speed?

Back

An example of constant speed is a car traveling at 60 km/h on a straight road without changing its speed.

Front

What happens to acceleration when an object changes direction?

Back

When an object changes direction, it is still accelerating, even if its speed remains constant. This is because acceleration includes changes in velocity, which can occur with direction changes.

Front

If a car travels 150 km in 2 hours, what is its average speed?

Back

Average speed = total distance / total time = 150 km / 2 hours = 75 km/h.

Front

What is the unit of acceleration?

Back

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