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According to Newton s second law of moti...

According to Newton s second law of motion `F =ma` where `F` is the force required to produce an acceleration a in a body of mass m If a = 0 then `F = 0` no external force is required to move a body uniformly along a straight line If a force `F` acts on a body for t seconds the effect of the force is given by Impulse =F `xx` t = change in linear momentum of the body
A cricket ball of mass `150g` is moving with a velocity of `12m//s` and is hit by a bat so that the ball is turned back with a velocity of `20m//s` if duration of contact between the ball and the bat is `0.01sec` The impulse of the force is .

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According to Newton s second law of motion F =ma where F is the force required to produce an acceleration a in a body of mass m If a = 0 then F = 0 no external force is required to move a body uniformly along a straight line If a force F acts on a body for t seconds the effect of the force is given by Impulse =F xx t = change in linear momentum of the body The retardation of the ball is .

According to Newton s second law of motion F =ma where F is the force required to produce an acceleration a in a body of mass m If a = 0 then F = 0 no external force is required to move a body uniformly along a straight line If a force F acts on a body for t seconds the effect of the force is given by Impulse =F xx t =change in linear momentum of the body Average force exerted by the bat is .

No force is required to move a body uniformly along a straight line. Comment.

Assertion : No force is required to move a body unifromly along a straight line Reason : Because F = ma = m (0) =0 .

Assertion : No force is required to move a body uniformly along a straight line . Reason : Because F=ma=m(0)=0.

Assertion : A force of 1 kg force produces an acceleration of 1 m//s^(2) in a body of mass 1 kg . Reason : a=F/m

Assertion : Force is required to move a body uniformly along a circle. Reason : When the motion is uniform, acceleration is zero.

(A) : Force is required to move a body uniformly along a circle. (R) : When the body is in uniform circular, acceleration is zero.

A body of mass 1kg is moving along a straight line with a velocity of 1m//s . The external force acting in the body is