Question # 1

Velocity of a body changes if

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direction of the body changes

speed of the body changes

neither speed nor direction changes

either speed or direction changes

If m is the mass of the gases ejected per second with velocity v relative to the rocket of mass M, then the acceleration of rocket is

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a = M/mv

a = mM/v

a = mv/M

a = v/mm

A body moving with uniform velocity has

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positive acceleration

negative acceleration

infinite acceleration

zero acceleration

Blomass includes:

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Crop residue

Natural vegetation

Animal dung

All of these

The product of force and time is called

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acceleration

linear momentum

angular momentum

impulse

The motion of a body in a straight line is the motion in

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one dimension

two dimension

three dimension

four dimension

A dirty carpet is to be cleaned by heating. This is in according with______law of motion.

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First

Second

Third

None of these

Change in momentum is one second is called:

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Impulse

Force

Energy

Work

The vertical and horizontal range will be equal id angle of projection is

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76°

45°

60°

120°

Distance covered by a freely falling body in 2 sec will be

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4.9 m

19.6 m

29.2 m

44.1 m

The three equation of motions are useful only for

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linear motion with increasing acceleration

line motion with uniform acceleration

linear motion with zero acceleration

linear motion with varying acceleration

The path followed by the projectile is known as:

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Cycle

Hyperbola

Trajectory

Route

Slope of velocity time graph represents:

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Acceleration

Speed

Torque

Work

Rate of change of momentum is called

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Impulse

Force

Torque

Momentum

A vehicle of mass 120 kg is moving with a uniform velocity of 108 km/h. The force required to stop the vehicle in 10s is

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120 x 10.8 N

180 N

720 N

360 N

The magnitude of the force producing an acceleration of 10 m/sec²in a body of mass 500 grams is:

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3 N

4 N

5 N

6 N

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

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