A body of mass `1kg` is moving according to the law `x(t)=(5t+4t^(2)+6t^(3))m` . The force acting on the body at time `t=2s` is

A body of mass 5kg moves according to the relation x=t^(2)+2t^(3) .The power used by the body at t=2s is?

A boat of mass 300 kg moves according to the equation x= 1.2t^(2) - 0.2 t^(3) . When the force will become zero ?

A particle moves along x-axis according to the law x=(t^(3)-3t^(2)-9t+5)m . Then :-

A body of mass 2kg travels according to the law x(t) = pt + qt^(2) + rt^(3) where , q = 4 ms^(-2) , p = 3 ms^(-1) and r = 5 ms^(-3) . The force acting on the body at t = 2s is

If S=6t^(2)-t^(3) , then the body comes to rest after time t=

A body of mass 6g is in rectilinear motion according to the law s=-1+(t+1)+(t+1)^(3) (s is in centimetres and t, in seconds). Find the kinetic enery of the body one second after it begins to move.

If a particle moves according to the law s=6t^(2)-(t^(3))/(2) , then the time at which it is momentarily at rest is

The momenta of a body in two perpendicular directions at any time 't' are given by P_(x)=2t^(2) +6 and P_(y)=(3t^(2))/(2)+3 . The force acting on the body at t =2 sec is .

The angular momentum of a body is given by L= (4t^(2)+2t+7)kgm^(2)s^(-1) .The net torque acting on the body at t=2s is

The displacement of a particle of mass 2kg moving in a straight line varies with times as x = (2t^(3)+2)m . Impulse of the force acting on the particle over a time interval between t = 0 and t = 1 s is