Question # 1

A car moves for half of its time at 80 km/h and rest half of time at 40 km/h, The total distance covered is 60 km. What is the average speed of the car?

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60 km/hr

80 km/hr

120 km/hr

180 km/hr

The horizontal range of projectile, at a certain place, depends upon

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the mass of the projectile

velocity of projection

angle of projection

angle as well as velocity of projection

During the upward motion of the projectile, the vertical component of velocity.

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Decreases

Increases

Remains constant

None of these

For a fixed force, larger is the mass of a body the

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greater is its acceleration

smaller is its acceleration

smaller is its weight

zero is its acceleration

In equation F=ma, then mass 'm' is

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rest mass

variable mass

inertial mass

gravitational mass

If the velocity time graph is a straight line parallel to the time-axis, then it means:

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The body is moving with uniform velocity

The body is moving with uniform acceleration

The body is at rest

None of these

The quantity F x t is called as

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momentum

velocity

acceleration

impulse

The path described by a projectile is called its

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orbit

trajectory

range

distance

A body of mass 1.0 kg is falling with an acceleration of 10 m/s². Its apparent weight will be (g=10 m/s²)

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1.0 kg wt

2.0 kg wt

0.5 kg wt

Zero

An aircraft is moving with a velocity of 300 ms^-1. If all the forces acting on it are balanced, then

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It still moves with the same velocity

It will be just floating at the same point in space

It will be fall down instantaneously

It will lose its velocity gradually

The SI units of momentum is

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kg m s^-2

kg ms

kg m s²

N-s

Rocket engines lift a rocket from the earth surface, because hot gas with high velocity

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Push against the air

React against the rocket and push it up

Heat up the air which lifts the rocket

Push against the earth

A projectile on its path gets divided into two pieces at its highest point. Which is true?

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Momentum increases

Momentum decreases

Kinetic energy increases

Kinetic energy decreases

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

The dimension of linear inertia is:

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MLT²

ML°T^-2

ML°T°

MLT^-1

A body moving with an acceleration of 5 m/sec²started with velocity of 10 m/sec. What will be the distance traversed in 10 seconds?

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150 m

250 m

350 m

400 m

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