Question # 1

A change in position of a body from its initial position to its final position is known as

Choose an answer

relative motion

displacement

distance

acceleration

The time rate of change of displacement is called:

Choose an answer

Time

Acceleration

Speed

Velocity

The three equation of motions are useful only for

Choose an answer

linear motion with increasing acceleration

line motion with uniform acceleration

linear motion with zero acceleration

linear motion with varying acceleration

Which of the following four statements is false?

Choose an answer

A body can have zero velocity and still be accelerated

A body can have a constant velocity and still have a varying speed

A body can have a constant speed and still have a varying velocity

The direction of the velocity of a body can change when its acceleration is constant

Ethanol (alcohol) as a type of:

Choose an answer

Electric fuel

Bio fuel

Nuclear fuel

None of these

A typical rocket ejects the burnt gases at speeds over

Choose an answer

400 ms^-1

40000m s^-1

40000 ms^-1

60000 ms^-1

If the values of instantaneous and average velocities are equal, the body is said to be moving with

Choose an answer

uniform acceleration

uniform speed

variable velocity

uniform velocity

In an elevator moving vertically up with an acceleration 'g' the force exerted on the floor by a passenger of mass M is

Choose an answer

Mg

1/2 Mg

Zero

2 Mg

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

If a car rest acceleration uniformly to a speed of 144 km/h in 20 s it covers a distance of

Choose an answer

20 m

400 m

1440 m

2880 m

A lift is moving up with acceleration equal to 1/5 of that due to gravity. The apparent weight of a 60 kg man standing in lift is

Choose an answer

60 kg wt

72 kg wt

48 kg wt

Zero

If d is the displacement of the body in time t, then its average velocity will be

Choose an answer

V_av= d x t

V_{av = t/d}

V_{av = d/t}

According to the law of conservation of linear momentum, the total linear momentum of an isolated system

Choose an answer

increases

decreases with time

remains constant

none of them

Two projectiles are fired from the same point with the same speed at angles of projection 60° and 30° respectively. Which one of the following is true?

Choose an answer

Their range will be same

Their maximum height will be same

Their landing velocity will be same

Their time of flight will be same

When a body is moving with uniform positive acceleration, the velocity- time graph is a straight line. Its slope is

Choose an answer

zero

negative

positive

non-existing

Work done along a closed path in a gravitational field is:

Choose an answer

Maximum

Minimum

Zero

Unity

Bodies failing freely under gravity provide good example of motion under

Choose an answer

non-uniform acceleration

uniform acceleration

variable acceleration

increasing acceleration

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

Choose an answer

zero

very large

very small

infinite

The motion of a body in a straight line is the motion in

Choose an answer

one dimension

two dimension

three dimension

four dimension

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 path (or trajectory) described by a projectile is

Choose an answer

a parabola

a hyperbola

a circle

a straight line

A body walks to his school at a distance of 6 km with a speed of 2.5 km/h and walks back with a constant speed of 5 km/h. His average speed for round trip expressed in km/h is

Choose an answer

24/13

10/3

3

4,8

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

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer