Question # 1

Distance covered by a freely failing body n the first second of its motion will be:

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4.9 m

9.8 m

19.6 m

29.4 m

When a bicycle is in motion but not pedaled, the force of friction exerted by the ground on the two wheels is such that it acts

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In the backward direction on the front wheel and in the forward direction on the rear wheel

In the forwards directions on the front wheel and in the backward direction on the rear wheel

In the forward direction on both the wheels

In the backward direction on both the wheels

Earth is considered to be

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a non-inertial frame

an inertial frame

an accelerated frame

none of the above

When a bicycle is in motion, the frictional forces exerted by the ground are

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In the forward direction on both the wheels

In the backward direction on both the wheels

In the forward direction on the front wheel and the backward direction on the rear wheel

In the backward direction on the front wheel and the forward direction on the rear wheel

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

Newton published laws of motion in his famous book "principia" in

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1867

1667

1676

1687

If a train traveling at 72 kmph is to be brought to rest in a distance of 200 meters then its retardation should be

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20 ms^-2

10 ms^-2

2 ms^-2

1 ms^-2

A typical rocket consumes about

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100 kg s^-1of fuel

1000 kg s^-1of fuel

10000 kg s^-1of fuel

100000 kg s^-1of fuel

The direction of the linear momentum is the direction of

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speed

velocity

weight

none of them

The consumption source if energy is:

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Energy from blomass

Hydroelectric energy

Geothermal energy

None of these

A body moving with an acceleration of 5 m/sec²started with velocity of 10 m/sec. What will be the distance traversed in 10 seconds?

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150 m

250 m

350 m

400 m

The shortest distance between two points directed from its initial point to final point is called:

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Velocity

Displacement

Speed

Distance

The collision in which KE is conserved but momentum is not conserved is called:

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Elastic collision

Inelastic collision

any these

None of these

A person is sitting in a traveling train and facing the engine. He tosses up a coin and the coin falls behind him. It can be concluded that the train is

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Moving forward and gaining speed

Moving forward and losing speed

Moving forward with uniform speed

Moving backward with uniform speed

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

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

Blomass includes:

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Crop residue

Natural vegetation

Animal dung

All of these

A motorist travels A to B at a speed at 40 km/h and returns at speed of 60km/h. His average speed will be

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40 km/h

48 km/h

50 km/h

60 km/h

A 5 kg mass is falling freely, the force acting on, it will be

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19.6 N

9.8 N

5 N

Zero

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

According to the law of conservation of linear momentum, the total linear momentum of an isolated system

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increases

decreases with time

remains constant

none of them

The entity which measures the quantity of motion in a body is called

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force

energy

momentum

power

The time of flight of a projectile motion equal to

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half of the time to reach maximum height

twice the time to reach maximum height

one fourth of time to reach maximum height

time to reach maximum height

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

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76°

45°

60°

120°

A body starting from rest covers a distance of 0.45 Km and acquires a velocity of 300 Kmh^-1. its acceleration will be

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7.71 m s^-2

0.5m s^-2

0.15m s^-2

0.092m s^-2

The instantaneous velocity is define as the limiting value of Δd/Δt on the time intervalΔt approaches to

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zero

maximum

minimum

infinity

The product of force and time is called

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acceleration

linear momentum

angular momentum

impulse

A ball is dropped from a certain height and another ball is projected horizontally from the same point. Which of the following statement is correct?

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Both hit the ground at the same veloctiy

Both hit the ground at the same speed

The change of velocity during the path for both balls is the same

The change of speed during the path for both balls is the same

Change in momentum is one second is called:

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Impulse

Force

Energy

Work

When brakes are applied to a fast moving car, the passengers will be thrown:

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Forward

Backward

Downward

None of these

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