Question

A body starting from rest moves with uniform acceleration until it attains a speed of 100m/s after 20 s. It maintained this speed for the next 30s and came to rest by  uniformly deceleration in 30s. (a.) Find its acceleration. (b)Draw the velocity-Time graph of the motion  (c)Using the information given by the graph calculate

The average speed for the whole journey

The total distance travelled


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Answer 1

Answer: Let t

be the time in seconds from the beginning of the motion of a particle. If the particle has a velocity of 4 m/s initially (at t=0

) and has a constant acceleration of 2 m/s2

, find the velocity of the particle:

when t=1

when t=2

after t

seconds.

Draw the velocity–time graph for the motion.

Solution

When t=1

, the velocity of the particle is 4+2=6

m/s.

When t=2

, the velocity of the particle is 4+2×2=8

m/s.

After t

seconds, the velocity of the particle is 4+2t

m/s.

Step-by-step explanation: