A boy throws a ball in a train moving at a speed of 18 kmph, with a ve

1.	A boy throws a ball in a train moving at a speed of 18 kmph, with a velocity of 15v2 m/s at anangle of 45° to the horizontal in the direction of motion of train. The angle with which it strikes theplane of projection w.r.t. an observer watching from the road near by to the train is
Answer» 18 kmph=5 m/s -v(x)=15+5=20{velocity along x before collision} -v(y)=-15{velocity along y before collision is same as u(y) with opposite sign} -now tan(Q)=v(y)/v(x)=15/20=3/4 so answer is 37°

A boy throws a ball in a train moving at a speed of 18 kmph, with a velocity of 15v2 m/s at anangle of 45° to the horizontal in the direction of motion of train. The angle with which it strikes theplane of projection w.r.t. an observer watching from the road near by to the train is

Answer»

18 kmph=5 m/s

-v(x)=15+5=20{velocity along x before collision}

-v(y)=-15{velocity along y before collision is same as u(y) with opposite sign}

-now tan(Q)=v(y)/v(x)=15/20=3/4

so answer is 37°

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A boy throws a ball in a train moving at a speed of 18 kmph, with a velocity of 15v2 m/s at anangle of 45° to the horizontal in the direction of motion of train. The angle with which it strikes theplane of projection w.r.t. an observer watching from the road near by to the train is

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