Class-9 - Physics - Chapter-8 - Motion (Level-1)

The acceleration of a body found from the v-t graph which is parallel to the time

axis is

• >0

• <0

• =0

• cannot be found

A particle is moving in a circular path of radius r. The displacement after half a

circle would be

• Zero

The numerical ratio of displacement to distance for a moving object is

• Always less than 1

• Always equal to 1

• Always more than 1

• Equal to or less than 1

The numerical ratio of average velocity to average speed is

• Always less than 1

• Always equal to 1

• Always more than 1

• Equal to or less than 1

The distance travelled by a body is directly proportional to the time taken. Its

speed

• Increases

• Decreases

• becomes zero

• Remains constant

Which of the following can be zero, when a particle is in motion for some time?

• Distance

• Displacement

• Speed

• None of them

A passenger in a moving train tosses a coin. If the coin falls behind him, the train

must be moving with

• An acceleration

• A deceleration

• A uniform speed

• Any of the above

The slope of velocity-time graph for motion with uniform velocity is equal to

• Final velocity

• Initial velocity

• Zero

• None of the above

A person travels along a straight road for half the distance with velocity v1 and

the remaining half distance with velocity v2. The average velocity is given by

• v1 v2

Distance can never be (a)   while displacement can be.