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3. Motion in a Straight Line
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Q19 of 35 Page 55

A particle starting from rest undergoes a rectilinear motion with acceleration a. The variation of ‘a’ with time t is shown below. The maximum velocity attained by the particle during its motion is. (a = 10 ms–2 and t = 12s)

Particle starts from rest

So, Initial Velocity = u = 0 ms–1


And it is given that Acceleration = a = ms–2 and time taken = t = 12 s


So, using equations of motion:




v = 120 ms–1


So, velocity attained is 120 ms–1


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17

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18

A car starts from rest and attains a velocity of 10 ms–1 in the 40s. The driver applies breaks and slows down the car to 5 ms–1 in 10s. Find the acceleration of the car in both the cases.

20

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Questions · 35
3. Motion in a Straight Line
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