Question # 1

If the slope of the velocity-time graph increases at constant rate with time, then the body is said to have

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uniform deceleration

uniform negative acceleration

average acceleration

uniform positive acceleration

When a bicycle is in motion, the frictional forces exerted by the ground are

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In the forward direction on both the wheels

In the backward direction on both the wheels

In the forward direction on the front wheel and the backward direction on the rear wheel

In the backward direction on the front wheel and the forward direction on the rear wheel

When a bicycle is in motion but not pedaled, the force of friction exerted by the ground on the two wheels is such that it acts

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In the backward direction on the front wheel and in the forward direction on the rear wheel

In the forwards directions on the front wheel and in the backward direction on the rear wheel

In the forward direction on both the wheels

In the backward direction on both the wheels

The short distance between two points direction from its initial point to final point is called:

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Velocity

Displacement

Speed

Distance

A typical rocket consumes about

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100 kg s^-1of fuel

1000 kg s^-1of fuel

10000 kg s^-1of fuel

100000 kg s^-1of fuel

If the acceleration of a body is not uniform, then velocity-time graph will be:

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Curve

Straight line

Sphere

All of these

The velocity of a projectile is maximum

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at the point of projection

just before striking the ground

at none of them

at both of them

The path described by a projectile is called its

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orbit

trajectory

range

distance

The artillery shells travel along parabolic paths under the influence of

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magnetic field

electric field

electromagnetic field

gravitational field

Rate of change of momentum is called

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Impulse

Force

Torque

Momentum

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

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maximum

Minimum

Zero

Unity

When the surfaces are coated with a lubricant, then they

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Stick to each other

Slide upon each other

Roll upon each other

None of these

Which of the following is not a projectile

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a bullet fired from a gun

a space ship

a football in air

an artillery shell

A body is dropped from a tower with zero velocity, reaches ground in 4s. The height of the tower is about

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80 m

20 m

160 m

40 m

Inertial frame of references are those frame of references which are moving with

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increasing velocity

decreasing velocity

constant velocity

all of them

A force of 50 dynes is acted on a body of mass 5 g which is at rest, for an interval of 3 seconds, then impulse is

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0.15 x 10^-3Ns

0.98 x 10^-3Ns

1.5 x 10^-3Ns

2.5 x 10^-3Ns

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ECAT Physics Chapter 3 Motion and Force Online Test MCQs With Answers

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