A lift accelerated downward with acceleration - -a- A man in the lift throws a ball upward with acceleration - a-0-a-0 lt- a- Then acceleration of ball observed by observer- which is on earth- is- -a - a-0- upward- -a - a-0- upward- -a - a-0- downward- -a - a-0- downward-

The correct option is D (a a_0) downward The lift is accelerating downward with acceleration 'a'. #160; #160;The ball is thrown upwards with an accel ...

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Standard XII

Physics

Instantaneous Velocity

A lift accele...

Question

A lift accelerated downward with acceleration $^{'} a^{'}$ . A man in the lift throws a ball upward with acceleration $a_{0} (a_{0} < a)$ . Then acceleration of ball observed by observer, which is on earth, is

(a + a_{0}) u p w a r d

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(a - a_{0}) u p w a r d

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(a + a_{0}) d o w n w a r d

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(a - a_{0}) d o w n w a r d

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Solution

The correct option is D $(a - a_{0}) d o w n w a r d$
The lift is accelerating downward with acceleration 'a'.
The ball is thrown upwards with an acceleration $a_{0}$ upwards. But, $a_{0} < a$ . So, the net acceleration is $a - a_{0}$
As the man is stationary on Earth, he will see the ball coming down along with the lift. But, the acceleration of the ball will be $a - a_{0}$ . So, the correct answer is option 4.

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A lift accelerated downward with acceleration ′a′. A man in the lift throws a ball upward with acceleration a0(a0<a). Then acceleration of ball observed by observer, which is on earth, is

A lift accelerated downward with acceleration $^{'} a^{'}$ . A man in the lift throws a ball upward with acceleration $a_{0} (a_{0} < a)$ . Then acceleration of ball observed by observer, which is on earth, is