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30 September, 07:05

A physics class conducting a research project on projectile motion constructs a device that can launch a cricket ball. The launching device is designed so that the ball can be launched at ground level with an initial velocity of 28 m / s at an angle of 30° to the horizontal. Calculate the horizontal component of the velocity of the ball:a. initiallyb. after 1.0 sc. after 2.0 s

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  1. 30 September, 07:19
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    initial velocity, u = 28 m/s

    Angle of projection, θ = 30°

    The acceleration in horizontal direction is zero, so the horizontal component of velocity is constant.

    Horizontal component of velocity, u cos θ = 28 x Cos 30 = 24.25 m/s

    At t = 2 sec, the horizontal component of velocity = 24.25 m/s

    At t = 3 sec, the horizontal component of velocity = 24.25 m/s
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