Kinematics Question 112

Question: The length of second hand watch is 1 cm. The change in velocity of it’s tip in 15 seconds is [MP PMT 1987]

Options:

A) Zero

B) π302cm/sec

C) π30cm/sec

D) π230cm/sec

Show Answer

Answer:

Correct Answer: D

Solution:

Δv=2vsin(902)=2vsin45

=2v×12=2v

=2×rω=2×1×2π60=2π `30 cm/s



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