A car moves in a circle at the constant speed of 50 m/s and completes one revolution in 40 s.

A car moves in a circle at the constant speed of 50 m/s and completes one revolution in 40 s.
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A car moves in a circle at the constant speed of 50 m/s and completes one revolution in 40 s. Determine the magnitude of the acceleration of the car.
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If a river flows from west to east with constant velocity of 1.0 m s-1 and a boat leaves south bank heading towards north with velocity of 2.40 m s-1, then resultant velocity of boat is A. 2.6 m s-1 B. 2.7 m s-1 C. 2.8 m s-1 D. 2.9 m s-1

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