Motion

Which statement about acceleration is correct?

1. Acceleration occurs only when speed increases.
2. Acceleration occurs only when speed decreases.
3. Acceleration occurs whenever velocity changes.
4. Acceleration is always zero during motion.

Which of the following is an example of uniform motion?

1. A freely falling stone
2. A car moving with constant speed in a straight line
3. A ball thrown upward
4. A cyclist moving on a hilly road with changing speed

An object moving along a circular path with constant speed has

1. Zero acceleration
2. Constant velocity
3. Changing velocity
4. Zero displacement at every instant

Which graph represents an object at rest?

1. Horizontal line on a distance-time graph
2. Vertical line on a distance-time graph
3. Curved distance-time graph
4. Increasing straight line

The slope of a velocity-time graph represents

1. Distance
2. Speed
3. Acceleration
4. Displacement

The slope of a distance-time graph for uniform motion represents

1. Acceleration
2. Velocity
3. Speed
4. Force

If an object moves with uniform velocity, its acceleration is

1. Positive
2. Negative
3. Zero
4. Infinite

Acceleration is defined as

1. Distance travelled per unit time
2. Change in velocity per unit time
3. Displacement per unit time
4. Force acting on an object

The SI unit of velocity is

1. km/h
2. m/s
3. cm/s
4. m/min

Velocity differs from speed because velocity includes

1. Mass
2. Force
3. Direction
4. Energy

Speed is defined as

1. Displacement divided by time
2. Distance divided by time
3. Force divided by mass
4. Velocity multiplied by time

Displacement is defined as

1. Total path travelled by an object
2. Shortest distance between initial and final positions with direction
3. Speed multiplied by time
4. Distance travelled in one second

Which physical quantity is a scalar quantity?

1. Displacement
2. Velocity
3. Acceleration
4. Distance

Which of the following is the SI unit of distance?

1. Centimetre (cm)
2. Kilometre (km)
3. Metre (m)
4. Millimetre (mm)