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  4. A boy standing on the footpath tosses a ball straight up and catches it. The driver of a car passing by moving with uniform velocity sees this. <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/cb1b24dab8376e15b982b207a55bf223-.png /> The trajectory of the ball as seen by the driver will be

Q. A boy standing on the footpath tosses a ball straight up and catches it. The driver of a car passing by moving with uniform velocity sees this.
image
The trajectory of the ball as seen by the driver will be

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Solution:

Velocity of a ball is measured relative to a fixed object or frame. If frame of reference is moving, then object will have a velocity opposite to that of frame of reference. In given case, car is frame of reference. Due to motion of car, the ball has two velocities
(i) vertical velocity
(ii) horizontal velocity opposite to motion of car.
Because of there two velocities, path of ball will be parabolic in car frame.
image
So, trajectory of ball will be as that of