Question

A ball A is thrown up vertically with a speed u and at the
same instant another ball B is released from a height h. At
time t, the speed of A relative to B is
(a) u
(b) 2u
(c) u-gt
(d) V (u? - gt)
​

Answer 1

Answer:

A)u

After time t,

v→A=(u−gt)jˆ

v→B=−gtjˆ

v→A−v→B=ujˆ

∣∣v→A/B∣∣

=u

Explanation:

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