Question # 1

Before the launch of a rocket the mass of fuel of the rocket is approximately consists of.

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60%

50%

80%

100%

Total change in momentum of an isolated system is

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Always (+) ve

Always (-) ve

Has maximum value

Zero

A mass of 1 kg is freely falling. The force of gravity is.

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1 N

9.8 N

0.5 N

Zero

A ball is thrown up vertically, it takes 3 sec to reach maximum height. Its initial velocity is.

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10 ms-1

12.2 ms-1

15 ms-1

29.4 ms-1

When the body moves with constant acceleration the velocity time graph is

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Parabola

Hyperbola

Straight line

Curve

A ball is thrown up with 20 ms-1 at an angle of 60 ^owith x-axis , the velocity of the ball at the top position is.

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0 ms-1

10 ms-1

20 ms-1

16 ms-1

The path followed by a projectile in known as its

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Range

Trajectory

Cycle

Height

The velocity of a free falling body just before Hattin the ground is 9.8 ms-1, the height through which is fall be

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98 m

19.6 m

4.9 m

9.8 m

The angle of projection for which its maximum height and horizontal range are equal

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46 ^o

56^o

66^o

76^o

The mass of a body is quantitative measure of its

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Motion

Inertia

Weight

All of these

When speed of a body is doubled then its

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K.E. is doubled

P.E. is doubled

Acceleration of doubled

Momentum is doubled

A typical rocket consumes fuel about

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40000 Kgs-1

30000 Kgs-1

20000 Kg s-1

10000 Kgs-1

The shortest distance between two points is called

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Distance

Amplitude

Displacement

Is a number

the shortest distance between two points is called.

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Speed

Acceleration

Distance

Displacement

If the slope of a velocity time graph gradually decreases than body is said to be moving with

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Positive acceleration

Negative acceleration

Uniform velocity

None

Rate of change of displacement is called

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Speed

Velocity

Kinetic energy

None of these

Average acceleration is a

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Scalar quantity

Vector quantity

(-) ve quantity

None of these

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Physics Fsc Part 1 Chapter 3 Online Test MCQs With Answers

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