FORCE AND LAWS OF MOTION

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Quiz - 1

Passengers standing in a bus are thrown outwards when the bus takes a turn suddenly. This happens because of *

4 points

Outward pull on them

Inertia

Change in momentum

Change in acceleration

Which one of the following statements is not correct for an object moving along a straight path in an accelerated motion *

4 points

Its speed keeps changing

Its velocity always changes

Its always goes away from earth

A force us always acting on it

Which of the following is an equation of motion of a body *

4 points

p=mv

F = ma

v-u = at

Ft = mv - mu

An object of mass of 2kg is sliding with the velocity of 4 m/s on a frictional horizontal surface, the retarding force necessary to stop the object in 1 second *

4 points

2 N

4 N

8 N

0 N

Newtons second law of motion gives a measure of *

4 points

Velocity

Force

Momentum

Rate of motion

A passenger in a moving train tosses a coin which falls behind him. It means that the motion of the train is *

4 points

Accelerated

Uniform

Retarded

Along circular tracks

A goalkeeper in a game of a football pulls his hands backward after holding the ball shot at the goal. This enables the goalkeeper to *

4 points

Exert larger force on the ball

Reduce the force exerted by the ball on hands

Increase the rate of change of momentum

Decrease the rate of change of momentum

Two objects each of mass 1.5 kg are moving in the same straight line but in opposite directions. The velocity of each object is 2.5m/s before the collision during which they stick together. The velocity of the combined object after collision is *

4 points

0 m/s

5/3 m/s

1.50 m/s

3.75 m/s

The rocket works on the principle of conservation of *

4 points

Mass

Energy

Momentum

Velocity

A force of 'P' N acts on a particle so as to accelerated it form rest to a velocity 'v' m/s. The force 'P' is then replaced by 'Q' N which decelerates it to rest *

4 points

P must be equal to Q

P may be equal to Q

P must be unequal to Q

None of these

According to Newton's third law of motion , action and reaction *

4 points

Always act on the same body

Always act on different bodies in oppsite direction

Have same magnitude and directions

Act on either body at normal to each other

Force is defined as *

4 points

Change in momentum

Rate of change of momentum

The quantity that opposes inertia

The quantity that keeps the velocity constant

The acceleration of an object is *

4 points

Inversely proportional to its mass

Directly proportional to the applied force

Resisted by inertia

All of the above

Inertia *

4 points

Sets objects in motion

Causes changes in motion

Is the result of a net force

Is directly proportional to the mass of an object

Inertia is the property by virtue of which the body *

4 points

Unable to change by itself the state of rest only

Unable to change by itself the direction of motion only

Unable to change by itself the state of uniform linear motion only

Unable to change by itself the state of rest and of uniform linear motion

An object of mass 2 kg is sliding with a constant velocity of 4 m/s on a frictional horizontal table l. The force required to keep the object moving with same velocity is *

4 points

2 N

8 N

32 N

0 N

A water tanker filled up to 2/3 of its height is moving with a uniform speed. On sudden application of breaks, the water in the tank would *

4 points

Move backward

Move forward

Be unaffected

Rise upwards

An unbalanced force is necessary for an object to be *

4 points

At rest

In motion with a constant velocity

Accelerated

All of the above

The inertia of an object twnds to cause the object *

4 points

Increasing its speed

To decreasing its speed

To resisit any change in the state of rest or of motion

To decelerate due to friction

The rate of change of momentum with respect to time is measured in *

4 points

kgms-2

kgms

kgm

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