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Q 1.
A passenger in a moving train tosses a coin that falls behind him. Which law of motion apply here?
Ans.
Accelerated.
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Q 2.
If the mass of the body is doubled and its velocity becomes half, then the linear momentum of the body will?
Ans.
Remains same.
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Q 3.
The air escape from mouth of the inflated balloon and balloon moves. Which law apply here?
Ans.
Third law of motion.
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Q 4.
Define third law of motion?
Ans.
To every action, there is an equal and opposite reaction.
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Q 5.
Forces of friction always opposes?
Ans.
Motion of objects.
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Q 6.
While catching a fast moving cricket ball, a boy in the ground gradually pulls his hands backwards with the moving ball. Which law of motion apply here?
Ans.
Second law of motion.
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Q 7.
Measure of inertia of an object is called?
Ans.
Mass.
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Q 8.
How much force produces an acceleration of 1 m s-2 on an object of mass 1 kg?
Ans.
1 Newton.
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Q 9.
SI unit of mass?
Ans.
Kilograms.
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Q 10.
When dirty blanke is beaten by stick dust comes out of it is example of?
Ans.
Law of inertia.
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Q 11.
Define Inertia?
Ans.
The natural tendency of objects to resist a change in their state of rest is called inertia.
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Q 12.
Name the scientist who develop telescope?
Ans.
Galileo Galilel.
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Q 13.
When a bus begins to move suddenly, we tend to fall backwards because of?
Ans.
Inertia.
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Q 14.
A forward force on the bullet and a recoil of the gun is example of?
Ans.
Third law of motion.
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Q 15.
SI unit of momentum?
Ans.
Kg m s-1
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Q 16.
Name the force that always opposes motion?
Ans.
Force of friction.
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Q 17.
If the direction is same as that of the velocity. What is the product of mass and velocity of an object?
Ans.
Momentum.
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Q 18.
Which type of force is applied to accelerate the motion of an object?
Ans.
Unbalanced force.
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