Motion in a straight line

If a particle moves with uniform speed v , along a straight line then it’s distance(s) is given by:

• s=v/t

• s=v.t

• s=v²t

• s=ut+0.5gt²

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

A body is thrown upward and after some time the body reaches it’s maximum height, At maximum height:

• It’s velocity and acceleration both are zero.

• It’s velocity is zero and acceleration is maximum

• It’s velocity is maximum and acceleration is minimum

• It’s velocity is zero and acceleration is equal to acceleration due to gravity(g).

If the displacement of a body is proportional to square of time then:

• The body moves with uniform velocity

• The body moves with uniform acceleration

• The body moves with increasing acceleration

• The body moves with decreasing acceleration

The distance traveled by a body travelling from rest in first , second and third second are in the ratio of:

• 1:2:3

• 1:3:5

• 1:4:9

• 1:4:8

The velocity-time graph of two bodies A and B are shown in figure , The ratio of their acceleration is:

• 1:√3

• 1:3

• √3:1

• √3:√2

The displacement -time graphs of two particles A and B are straight lines inclined at angle 30° and 60° with the time axis. the ratio of V_A : V_B must be:

• 1:2

• 1:√3

• √3:1

• 1:3

The velocity-time graph of a moving particle is shown in figure , The acceleration is maximum for part:

• AB

• BC

• CD

• Equal in all parts

The velocity-time graph of a body is shown in figure, the acceleration for points AB , BC and CD are

• 2 m/s² , 1 m/s² , 2 m/s²

• 1 m/s² , 2 m/s² , 3m/s²

• 2 m/s² , 0 m/s² ,3 m/s²

• 0.5 m/s² , infinity m/s² ,0.33 m/s²

A body is thrown with speed 20m/s vertically upward , It will return to thrower’s hand after a time of:(assume g=10m/s²)

• 2s

• 4s

• 20s

• never