Question # 1

The path described by a projectile is called its

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orbit

trajectory

range

distance

A body is moving with constant velocity of 10 m/sec in the north-east direction. Then its acceleration will be:

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10 m/sec²

20 m/sec²

30 m/sec²

Zero

If the water falls from a dam into a turbine wheel 19.6 m below, then the velocity of water at the turbine, is (Take g=9.8 m/s²)

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9.8 m/s

19.6 m/s

39.2 m/s

98.0 m/s

In velocity of a particle at an instant is 10 m/s and after 5s the velocity of the particle is 20 m/s. The velocity 3s before in m/s is

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8

4

6

7

Swimming becomes possible because of______law of motion:

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First

Second

Third

None of these

The motion of a projectile is

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one dimension

two dimension

three dimension

all of them

A body of mass 5 kg is acted upon by a total change n momentum will be:

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10 NS

100 NS

140 NS

200 NS

Which quantity has the same dimension as that of impulse?

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KE

Power

Momentum

Work

If the acceleration of a body is negative, then slope of the velocity-time graph will be:

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Zero

Positive

Negative

Infinity

The linear momentum of the body is defined as

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p=ma

p=1/2ma

p=mv

p=1/2mv

If a ball comes back to its starting point after bouncing off the wall several times, then its

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total displacement is zero

average velocity is zero

none of them

both of them

The decrease in velocity per unit time is called

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deceleration

acceleration

uniform acceleration

variable acceleration

Linear momentum is a

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fixed quantity

constant quantity

scalar quantity

vector quantity

An object thrown upward with an initial velocity at certain angle with the horizontal and moving freely under the action of gravity is called

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a rocket

an aeroplane

a projectile

a ballon

Acceleration produced in a body by a force varies

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inversely as the applied force

directly as the applied force

directly as the mass of the body

none of them

When a force is applied on a body, several effects are possible Which of the following effect could not occur?

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the body rotates

the body speeds up

the mass of the body decreases

the body changes its direction

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

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