A block of mass m is kept on the ground. A vertically upward for F = kt (K is a positive constant) where 't' is in seconds , starts to act on it at t = 0

A block of mass m is kept on the ground. A vertically upward for F = k

1.	A block of mass m is kept on the ground. A vertically upward for F = kt (K is a positive constant) where 't' is in seconds , starts to act on it at t = 0
Answer» the block looses contact with ground at t = mgK For `0 lt t le (mg)/K` , normal REACTION decrease linearly with time but force exerted by body on ground ALSO DECREASES For `0 lt t le (mg)/k` , normal reaction decrease linearly with time but force exerted by body on ground is a constant At `t=(2mg)/k` , velocity of the body is zero Answer :A::B::C