Question # 1

In a one-dimensional elastic collision, the relative velocity of approach before collision is equal to:

Choose an answer

Sum of the velocities of the bodies

e times the relative velocity of separation after collision

1⁄𝑒 times the relative velocity of separation after collision

relative velocity of separation after collision

A particle executing one dimensional motion, finally comes to rest, what will be the angle between acceleration and displacement during motion:

Choose an answer

0

π

𝜋/2

𝜋/4

A body of mass m having an initial velocity v, makes head on elastic collision with a stationary body of mass m. After the collision, the body of mass m comes to rest and only the body having mass M moves. This will happen only when:

Choose an answer

m>>M

m<<M

) m=M

m=1M

Speedometer of an automobile measures

Choose an answer

Average velocity

Instantaneous velocity

Acceleration

Instantaneous speed

Vertical component of velocity of the projectile at any instant ‘t’ from the ground is given by:

Choose an answer

𝑣𝑖𝑐𝑜𝑠𝜃

𝑣𝑖𝑐𝑜𝑠𝜃 − 𝑔t

𝑣𝑖𝑠𝑖𝑛𝜃 − 𝑔t

𝑣𝑖𝑠𝑖𝑛𝜃 + 𝑔t

A rigid uniform bar of length 2.4 m is pivoted horizontally at its mid-point, weights are hung from two points of the bar as shown in diagram. To maintain horizontal equilibrium, a couple is applied to the bar: What is the torque and the direction of couple?

Choose an answer

40 N m clockwise

40 N m anti-clockwise

80 N m clockwise

80 N m anti-clockwise

The centre of gravity of a triangular plate is at

Choose an answer

On end of the plate

The midpoint of any side of the plate

A rider uses Motorcycle safety helmet that extends the time of collision during accident hence decreasing the

Choose an answer

Change of collisio

Force acting

Velocity

Impulse

Two railway trucks of masses m and 3m move towards each other in opposite directions with speeds 2v and v respectively. These trucks collide and stick together. What is the speed of the trucks after the collision?

Choose an answer

v/4

v/2

v

5v/4

At the highest point on the trajectory of a projectile, its

Choose an answer

Potential energy is minimum

Kinetic energy is maximum

Total energy is maximum

Kinetic energy is minimum

A boy is travelling from Lahore to Karachi with uniform velocity . Its

Choose an answer

Speed changes

Acceleration changes

Direction of motion changes

Displacement from origin changes

If the range of a projectile is R, the potential energy will be maximum after the projectile has covered (from start) distance equal to:

Choose an answer

R/2

R/4

R

R/9

The distance covered by a body in time ‘t’ starting from rest is:

Choose an answer

1/2 𝑡²

vt

𝑎𝑡²

𝑎𝑡₂

The rate of change of momentum of a body falling freely under gravity is equal to its

Choose an answer

Impulse

Kinetic energy

Pover

Weight

A machine gun fires ‘n’ bullets per second and the mass of each bullet is m. If v is the speed of each bullet then the force exerted on the machine gun is:

Choose an answer

mng

mnv

mnvg

mnv/g

The angular momentum of a body changes from 30 J-S to 50 J-S in 0.5 sec. The torque acting on it is

Choose an answer

40 N-m

100 N-m

50 N-m

150 N-m

What is the resultant force in the diagram shown?

Choose an answer

Zero

6N to left

6N to right

11N to right

If a body changes its momentum from 100 N s to 200 N s in 10 s then the unbalanceexternal force responsible to change the momentum is

Choose an answer

5 N

2.5 N

2n

10n

In the absence of air resistance, a stone is thrown from P and follows a parabolic path in which the highest point reached is T. The vertical component of acceleration of stone is:

Choose an answer

Zero at T

Greatest at T

) Greatest at P

the same at P as at T

More Classes

Other Links

MDCAT Physics Chapter 1 Force and motion Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer