Question # 1

The area under line velocity-time graph is numerically equal to the

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speed of the body

acceleration of the body

distance covered by the body

none of them

The decrease in velocity per unit time is called

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deceleration

acceleration

uniform acceleration

variable acceleration

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

Find the total displacement of a body in 8 seconds starting from rest with an acceleration of 20 cm/s²

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0.064 m

640 cm

64 cm

64 m

A mass of 5kg moves with an acceleration of 10m s^-2force applied is

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10N

50N

2N

20N

Bodies failing freely under gravity provide good example of motion under

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non-uniform acceleration

uniform acceleration

variable acceleration

increasing acceleration

A car travels first half distance between two places with a speed of 30 km/h and remaining half with a speed of 50 km/h. The average speed of the car is

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37.5 km/h

10 km/h

42 km/h

40 km/h

A typical rocket consists of fuel

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more than 60% of launch mass

less than 60% of launch mass

less than 80% of launch mass

more than 80% of launch mass

Blomass includes:

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Crop residue

Natural vegetation

Animal dung

All of these

When a body is moving on a surface, the force of friction is called

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Static friction

Dynamic friction

Limiting friction

Rolling friction

The discuss used by athlete has a mass of 1 kg, its weight in newton is

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9.8 N

80 N

98 N

100 N

Body which falls freely under gravity provides good example of motion under:

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Uniform acceleration

Non-uniform acceleration

Uniform velocity

None of these

The magnitude of the displacement is a line from initial position to final position which is

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straight

curved

either be curved or straight

none of them

In an elevator moving vertically up with an acceleration 'g' the force exerted on the floor by a passenger of mass M is

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Mg

1/2 Mg

Zero

2 Mg

The direction of the acceleration is the same as that of

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speed

velocity

both of them

none of them

When a shell explodes in mid-air, its fragments fly off in

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only one direction

in two direction

different directions

a particular direction

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

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