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

What is the formula for average acceleration?

Back

Average acceleration = (final velocity - initial velocity) ÷ time.

Front

If an object is moving at a constant speed, does it have acceleration?

Back

No, if an object is moving at a constant speed in a straight line, it has zero acceleration.

Front

What does a negative acceleration indicate?

Back

Negative acceleration indicates that an object is slowing down.

Front

What is the unit of acceleration in the SI system?

Back

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

Front

How do you calculate the time taken to stop an object given its initial velocity and acceleration?

Back

Use the formula: t = (v_f - v_i) / a, where v_f is the final velocity (0 for stopping), v_i is the initial velocity, and a is the acceleration.

Front

What is the relationship between acceleration and force?

Back

According to Newton's second law, acceleration is directly proportional to the net force acting on an object and inversely proportional to its mass (F = m*a).

Front

What is the effect of mass on acceleration?

Back

For a given force, an increase in mass results in a decrease in acceleration.

Front

If a car accelerates 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 uniform acceleration?

Back

Uniform acceleration occurs when an object's acceleration is constant over time.