Speed, Velocity, Acceleration

Front

What is speed?

Back

Speed is how much distance is covered over a period of time.

Front

Which of the following is a unit of distance?

Back

km (kilometers) is a unit of distance.

Front

What is the formula to calculate speed?

Back

Speed = distance/time.

Front

What is the speed of a man who runs 10 miles in 1 hr?

Back

10 miles/hr.

Front

What is the velocity of a runner who travels South 100 m in 10 seconds?

Back

10 m/s South.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity (magnitude only), while velocity is a vector quantity (magnitude and direction).

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity over time.

Front

What is the formula for acceleration?

Back

Acceleration = (final velocity - initial velocity) / time.

Front

If a car increases its speed from 20 m/s to 50 m/s in 5 seconds, what is its acceleration?

Back

Acceleration = (50 m/s - 20 m/s) / 5 s = 6 m/s².

Front

What is a scalar quantity?

Back

A scalar quantity has only magnitude, such as speed or distance.