Questions

true or false

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5 questions · timed · auto-graded

Question 11 Mark
Greater the mass less is the inertia of motion but greater is the inertia of rest. [True/ False]
Answer
False.
Explanation: The tendency of an object to resist changes in its state of motion varies with mass. Mass is that quantity that is solely dependent upon the inertia of an object. A more massive object has a greater tendency to resist changes in its state of motion.
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Question 21 Mark
A body cannot have zero velocity but non zero momentum together. [True/ False]
Answer
True.
Explanation: Momentum is the product of velocity and mass. Now, if a body possess zero acceleration this means that there is no change in velocity, that doesn't means that the velocity will have to be zero. thus, momentum is only zero when the velocity of the body is zero as because mass cannot be zero if the object exists.
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Question 31 Mark
The gun recoils on firing a bullet due to reaction force exerted by bullet. [True/ False]
Answer
True.
Explanation: Sir Isaac Newton answered this within his laws of physics. “For every action, there is an equal and opposite reaction.” The bullet, which is the projectile that actually comes out of the barrel of a gun, accelerates quickly in one direction. The cause of the acceleration is besides the point. It’s the acceleration itself which is the action. That action causes the “equal and opposite” reactive force on the gun.
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Question 41 Mark
When a rolling football stops on its own, it violates the first law of motion. [True/ False]
Answer
True.
Explanation: Newton's First Law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. A rolling ball faces frictional force in the opposite direction of motion which stops the ball.
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Question 51 Mark
Impulse is equal to change in momentum. [True/ False]
Answer
True.
Explanation: Impulse is the change in momentum of an object, often as a result of collision where the impact time is very small. An example is a bat hitting a ball. Thus Impulse, often denoted by J = Delta (mv).
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