Assertion (A) : A body thrown vertically up with a velocity ‘ u’ reaches the maximum height h’ after T seconds. At a time 2T seconds its velocity be u. Reason (R) : A particle thrown vertically up with a velocity comes back to its initial position with same magnitude of velocity but in opposite direction.
Answers
Answer:
Assertion (A) : A body thrown vertically up with a velocity u reaches the maximum height h after T seconds. At a time 2T seconds its velocity be u. Reason (R) : A particle thrown vertically up with a velocity comes back to its initial position with same magnitude of velocity but in opposite direction.
Answer:
The reason (R) is correct, but the assertion (A) is incorrect.
Explanation:
The assertion (A) is incorrect while the reason (R) is correct.
The assertion (A) states that a body thrown vertically up with a velocity 'u' reaches the maximum height 'h' after T seconds, which is incorrect. The time taken to reach the maximum height can be calculated using the formula t = u/g, where u is the initial velocity and g is the acceleration due to gravity. Therefore, the time taken to reach the maximum height is T = u/g.
However, the reason (R) is correct. A particle thrown vertically up with a velocity 'u' reaches the maximum height and then falls back to its initial position with the same magnitude of velocity but in the opposite direction. This is because the acceleration due to gravity acts in the opposite direction to the initial velocity, causing the velocity to decrease until it becomes zero at the maximum height. The velocity then starts to increase in the opposite direction due to the acceleration of gravity, resulting in the particle returning to its initial position with the same magnitude of velocity but in the opposite direction.
Therefore, the reason (R) is correct, but the assertion (A) is incorrect.
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