30. A car travels in the positive x direction at 20 ms
and needs to pass a truck. The car's velocity is
increased to 25 min 2s. Find the average acceleration of the car.
right answer will be mark as Brainelist
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30. A car travels in the positive x direction at 20 ms
and needs to pass a truck. The car's velocity is
increased to 25 min 2s. Find the average acceleration of the car.
right answer will be mark as Brainelist
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Answer:
Here, Side of the given square field = 10m
so, perimeter of a square = 4*side = 10 m * 4 = 40 m
Farmer takes 40 s to move along the boundary.
Displacement after 2 minutes 20 s = 2 * 60 s + 20 s = 140 seconds
since in 40 s farmer moves 40 m
Therefore, in 1s the distance covered by farmer = 40 / 40 m = 1m
Therefore, in 140s distance covered by farmer = 1 � 140 m = 140 m. Now, number of rotation to cover 140 along the boundary= Total Distance / Perimeter
= 140 m / 40 m = 3.5 round
Thus, after 3.5 round farmer will at point C of the field.
Thus, after 2 min 20 seconds the displacement of farmer will be equal to 14.14 m north east from initial position.
Verified answer
acceleration= change in velocity with respect to time.
=dv/dt = 25-20/2 =5/2 =2.5 m/sec^2
Hope helps
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