Calculating Acceleration

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object with respect to time. It is a vector quantity, meaning it has both magnitude and direction.

Front

How is acceleration calculated?

Back

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

Front

What is the unit of acceleration in the SI system?

Back

The unit of acceleration in the SI system is meters per second squared (m/s²).

Front

If a car accelerates from 0 to 100 km/hr in 5 seconds, what is the first step to find its acceleration?

Back

Convert the final velocity from km/hr to m/s. 100 km/hr = 27.78 m/s.

Front

A golf ball accelerates at 15 m/s². If it starts from rest, how long will it take to reach a velocity of 50 m/s?

Back

Using the formula t = (final velocity - initial velocity) / acceleration, t = (50 m/s - 0 m/s) / 15 m/s² = 3.33 seconds.

Front

What does a negative acceleration indicate?

Back

Negative acceleration indicates that an object is slowing down or decelerating.

Front

Calculate the acceleration of a car that goes from rest to 60 m/s in 5 seconds.

Back

Acceleration = (60 m/s - 0 m/s) / 5 s = 12 m/s².

Front

What is the formula to calculate the time taken for an object to accelerate?

Back

Time (t) can be calculated using the formula: t = (final velocity - initial velocity) / acceleration.

Front

If a ball of clay hits a wall at 28.0 m/s and stops in 0.020 s, what is the acceleration?

Back

Acceleration = (final velocity - initial velocity) / time = (0 m/s - 28.0 m/s) / 0.020 s = -1400 m/s².

Front

What is the acceleration of a car that reaches 20 m/s from rest in 3.5 seconds?

Back

Acceleration = (20 m/s - 0 m/s) / 3.5 s = 5.7 m/s².