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Most Important Selected Qs for JEE AdvancedPhysicsLaws of Motion

A board is being moved with a cosntant velocity v ₀ on a smooth horizontal plane. A small block is projected on the rough boards. Coefficient of friction between board and block is =0.3 . Block is projected with velocity v ₁=25 ~m / s at an angle of =37^ relative to ground. What is the velocity of block ( in m / s ) relative to ground after time t =10 sec .

Correct answer

8

Step-by-step solution

aligned & a=-3 & u= (25 4 5 -8 )^2+ (25 3 5 )^2 = (12)^2+(15)^2 =3 41 aligned at t = 3 41 3 so it will stop relative motion before 10 sec . So it will have same velocity as plank.

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