Questions
A hockey player receives a corner shot at a speed of 15 m/s at angle 30° with y-axis and then shoots the ball along x-axis with the speed 30 m/s. If the mass of the ball is 150 g and it remains in contact with the hockey stick for 0.01 s, the force exerted on the ball along x-axis is
detailed solution
Correct option is C
Fx=ΔPxΔt=mv2x−mv1xΔt=m(v2x−v1x)Δt=(150×10−3)[30−(−15sin30o)]0.01=(150×10−3)(30+7.5)0.01=562.5 NTalk to our academic expert!
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Three particles each of mass m are located at vertices of an equilateral triangle ABC. They start moving with equal speeds each along the meridian of the triangle and collide at its center G. If after collisions A comes to rest and B returns its path along GB, then C
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