Question # 1

A certain force gives an acceleration of 2 m/sec²to a body mass 5 kg. The same force would give a 20 kg object an acceleration of:

Choose an answer

0.5 m/sec²

5 m/sec²

1.5 m/sec²

9.8 m/sec²

If m is the mass of the gases ejected per second with velocity v relative to the rocket of mass M, then the acceleration of rocket is

Choose an answer

a = M/mv

a = mM/v

a = mv/M

a = v/mm

In above figures, tell which set of graphs shows that a body is moving with uniform velocity:

Choose an answer

(i) and (ii)

(ii) and (iii)

(iii) and (iv)

A body is thrown from a height h with speed u, it hits the ground with speed V

Choose an answer

The value of V is maximum if the body is thrown vertically downward

The value of V is maximum if the body is thrown vertically upwards

The value of V is minimum if the body is thrown horizontally

The value of V does not depend on the direction of which it is thrown

When a shall explodes a mid-air, the total momentum of its fragments is

Choose an answer

less than the momentum of shell

equal to the momentum of shell

greater than the momentum of shell

none of them

The expression F x t is called impulse if the time 't' is

Choose an answer

zero

very large

very small

infinite

When two protons are brought closer potential energy of both of them:

Choose an answer

Increases

Decreases

Remains same

None of these

If the velocity of the body decreases non-uniformly then the slope of the velocity-time graph will have

Choose an answer

different values

same values

zero valves

constant valves

When two protons are brought closer potential energy of both of them:

Choose an answer

Increases

Decreases

Remains same

None of these

Slope of velocity-time graph represents:

Choose an answer

Acceleration

Speed

Torque

Work

Swimming becomes possible because of______law of motion:

Choose an answer

First

Second

Third

None of these

An inertial frame of reference is that frame of reference in which

Choose an answer

a = 0

a > 0

a < 0

all of them

A body moving with uniform velocity has

Choose an answer

positive acceleration

negative acceleration

infinite acceleration

zero acceleration

A ball is dropped downwards After 1 second another ball is dropped downwards from the same point. What is the distance between them after 3 seconds

Choose an answer

25 m

20 m

50 m

9.8 m

A body starting from rest covers a distance of 0.45 Km and acquires a velocity of 300 Kmh^-1. its acceleration will be

Choose an answer

7.71 m s^-2

0.5m s^-2

0.15m s^-2

0.092m s^-2

More Classes

Other Links

Physics ECAT Pre Engineering Chapter 3 Motion and Force 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