A block of mass 10 kg is kept on ground. A vertically upward force `F=(20 t)N`, where `t` is the time in seconds starts on it at `t=0`.
(a) Find the time at which the normal reaction acting on the block is zero.
(b) The height of the block from ground at `t=10` sec.

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 10 kg is kept over a rough surface and a force F=4t is applied on it. At what value of t the block will start moving :-

A block of mass 10 kg is kept over a rough surface and a force F=4t is applied on it. At what value of t the block will start moving :-

A block of mass 10 kg is kept over a rough surface and a force F=4t is applied on it. At what value of t the block will start moving :-

A block of 7 kg is placed on a rough horizontal surface and is pulled through a variable force F(in N) =5t, where 't' is time in second, at an angle of 37^(@) with the horizontal as shown in figure. The coefficient of static friction of the block with the surface is one. if the force starts acting at t=0 s, find the time at which the block starts to slide. (Take g=10 m//s^(2) )

A block of 7 kg is placed on a rough horizontal surface and is pulled through a variable force F(in N) =5t, where 't' is time in second, at an angle of 37^(@) with the horizontal as shown in figure. The coefficient of static friction of the block with the surface is one. if the force starts acting at t=0 s, find the time at which the block starts to slide. (Take g=10 m//s^(2) )

A block of 7 kg is placed on a rough horizontal surface and is pulled through a variable force F(in N) =5t, where 't' is time in second, at an angle of 37^(@) with the horizontal as shown in figure. The coefficient of static friction of the block with the surface is one. if the force starts acting at t=0 s, find the time at which the block starts to slide. (Take g=10 m//s^(2) )

A small block of mass 1 kg starts moving with constant velocity 2 m/s on a smoth long plank of mass 10 kg which is also pulled by a horizontal force F=10 t where t is is in seconds and f in newton 's (the initial velocity of the plank is zero) the time (tne0) at which displacement of block and plank with esspect with repect to ground is same will be

A small block of mass 1 kg starts moving with constant velocity 2 m/s on a smoth long plank of mass 10 kg which is also pulled by a horizontal force F=10 t where t is is in seconds and f in newton 's (the initial velocity of the plank is zero) the time (tne0) at which displacement of block and plank with esspect with repect to ground is same will be

Find the modulus of average acceleration (in m/s2) of the block from time t = 2 sec to t = 4 sec.