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Physics - Kinematics Question with Solution | TestHub

PhysicsKinematics2-D & 3DMedium3 minQB

PhysicsMediuminteger

A boy on a train accelerating uniformly throws a ball toward the front at 30 m/s, 53° above the horizontal, when the train moves at 20 m/s. He catches the ball without moving from his seat, at the same height. The train's speed at the catch is:

Answer:

Solution:

Ball horizontal speed
$= 20 + 30 cos 5 3^{\circ} = 38 m / s; 20 t + \frac{1}{2} a t^{2} = 38 t$
gives
$a t = 36 m / s; v = 20 +$ $36 = 56 m / s$ .

Stream:JEESubject:PhysicsTopic:KinematicsSubtopic:2-D & 3D

⏱ 3mℹ️ Source: QB

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