13.
A particle travels with constant speed on a circle of
radius 3 metres and completes one revolution in 20
seconds. Starting from origin O, find the magnitude
and direction of displacement vector 5 seconds later -
3m
→X
v
(A) 4.2 m at an angle of 45° with X-axis
(B) 5.54 m at an angle of 67.5° with x-axis
(C) 6m at an angle of 90° with x-axis
(D) 5m at an angle of 60° with x-axis
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Answer:
A particle travels with constant speed on a circle of
radius 3 metres and completes one revolution in 20
seconds. Starting from origin O, find the magnitude
and direction of displacement vector 5 seconds later -
3m
→X
v
(A) 4.2 m at an angle of 45° with X-axis
(B) 5.54 m at an angle of 67.5° with x-axis
(C) 6m at an angle of 90° with x-axis
(D) 5m at an angle of 60° with x-axis
Explanation:
(C) option is correct
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