Linear Motion Review

Front

What is the formula to calculate speed?

Back

Speed = Distance / Time

Front

Define acceleration.

Back

Acceleration is the rate of change of velocity per unit time.

Front

What is the unit of acceleration in the metric system?

Back

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

Front

What does negative acceleration indicate?

Back

Negative acceleration indicates that an object is slowing down.

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

How do you calculate the final velocity of an object in free fall?

Back

Final velocity (v) = Initial velocity (u) + (Acceleration (a) × Time (t)). For free fall, a = 9.8 m/s².

Front

What is the acceleration of an object moving at a constant speed?

Back

The acceleration is 0 m/s².

Front

If a car increases its speed from 20 m/s to 30 m/s in 5 seconds, what is its acceleration?

Back

Acceleration = (Final speed - Initial speed) / Time = (30 m/s - 20 m/s) / 5 s = 2 m/s².

Front

What is the effect of gravity on a freely falling object?

Back

Gravity causes the object to accelerate downwards at approximately 9.8 m/s².

Front

Define positive acceleration.

Back

Positive acceleration occurs when an object speeds up.