Answer- A
Newton’s third law of motion states that for every action there is an equal and opposite reaction.
These action-reaction forces act on two different bodies.
E.g. while walking, we push the ground backward (action).
The ground, in turn, pushes us forward (reaction) which helps us move on the ground.
Answer- B
Due to the inertia of motion, the upper half of their body resists this sudden change in state and continues to move in the direction of the bus, causing the person to roll forward.
Answer- A
Answer- B
Its velocity is zero and acceleration is the acceleration due to gravity At maximum height, velocity of the body is zero and acceleration is the acceleration due to gravity which is constant.
Answer-C
Answer-A
Answer-A
When a force acts on a body for a period of time, then the product of force and time is known as impulse. Impulse is also equal to the magnitude of change in momentum. Hence, the SI unit of impulse is kg m s−1 or N s.
Answer- A
Answer-C
No. The value of acceleration due to gravity varies from place to place. It depends on the distance of that point from the centre of earth. Hence it is maximum at poles and minimum at the equator
Answer- A
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