Acceleration

Front

What is acceleration?

Back

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

Front

How is acceleration calculated?

Back

Acceleration (a) is calculated using the formula: a = (v_f - v_i) / t, where v_f is the final velocity, v_i is the initial velocity, and t is the time taken.

Front

What is the unit of acceleration?

Back

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

Front

If an object is moving at a constant speed, what is its acceleration?

Back

If an object is moving at a constant speed, its acceleration is 0 m/s².

Front

What does a negative acceleration indicate?

Back

A negative acceleration indicates that an object is slowing down.

Front

Calculate the acceleration of a roller coaster that accelerates from 6.0 m/s to 70 m/s in 4 seconds.

Back

The acceleration is 16 m/s².

Front

A car starts from rest and reaches a speed of 20 m/s in 3.5 seconds. What is its acceleration?

Back

The acceleration is 5.7 m/s².

Front

What is the formula to find time when final velocity, initial velocity, and acceleration are known?

Back

The formula is t = (v_f - v_i) / a.

Front

If a dog runs with an initial speed of 7.5 m/s and slides to a stop in 15 seconds, what is the acceleration?

Back

The acceleration is -0.5 m/s².

Front

What is the effect of braking on a car's acceleration?

Back

Braking causes negative acceleration, which reduces the car's speed.