Question # 1

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

Two projectiles ‘A’ and ‘B’ are thrown with same speed but at angle of 40 degree and 50 degree with the horizontal. The horizontal range of ‘A’ will be:

Choose an answer

Equal to that of ‘B’

Greater than that of ‘B’

Less than that of ‘B’

4/5times that of ‘B’

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 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

Two bodies are projected at angle 𝜽 𝒂𝒏𝒅 (𝟗𝟎 − 𝜽) to the horizontal with the same speed. The ratio of their times of flight is:

Choose an answer

sin 𝜃 : 1

cos 𝜃 : 1

sin 𝜃 : cos𝜃

cos 𝜃 : sin𝜃

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

Two astronauts in a satellite must have

Choose an answer

Same masses

Same real weights

Same apparent weights

None of these

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

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 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 stone is thrown upwards it returns to ground describing a parabolic path which of the following remains constant:

Choose an answer

Speed of the ball

Kinetic energy of the ball

Vertical component of velocity

) Horizontal component of velocity

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

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 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

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

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

As in linear motion force determines linear acceleration where as in circular motion torque determines its

Choose an answer

Angular acceleration

Linear acceleration

Vibratory acceleration

Tangential acceleration

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

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