Question # 1

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

Acceleration of a body is negative if the velocity of the body is

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constant

increasing

decreasing

none of them

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 consumption of energy by a 1000 watt heter in half an hour is:

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5 Kwh

0.5 Kwh

2.5 Kwh

3.2 Kwh

The decrease in velocity per unit time is called

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deceleration

acceleration

uniform acceleration

variable acceleration

Ethanol (alcohol) as a type of:

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Electric fuel

Bio fuel

Nuclear fuel

None of these

Swimming becomes possible because of______law of motion.

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First

Second

Third

None of these

If the instantaneous velocity of a body does not change. the body is said to be moving with

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average velocity

uniform velocity

instantaneous velocity

variable velocity

Range of a projectile is R, when the angle of projection is 30° . Then, the value of the other angle of projection for the same range, is

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45°

60°

50°

40°

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

Graphs which are used to illustrate the variation of velocity of an object with time are called

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distance time graphs

speed time graphs

velocity time graphs

acceleration time graphs

Velocity is a

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scalar quantity

vector quantity

constant quantity

none of them

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

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rest mass

variable mass

inertial mass

gravitational mass

A train of 150 m length is going towards north direction at a speed of 10 ms^-1. A parrot files at a speed of 5 ms^-1towards south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to

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12 s

8 s

15 s

10 s

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

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a = 0

a > 0

a < 0

all of them

The dimension of linear inertia is:

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MLT²

ML°T^-2

ML°T°

MLT^-1

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