Question

A car travelling initially at 7 ms–1 accelerates at the rate of 8.0 ms–2 for an interval of 2.0 s. What is its velocity at the end of the 2 s?

Answer 1

Answer:

u=7m/s

a=8m/s^2

t=2s

v=u+at

v=7 + 8×2

v=7+16

v=23m/s

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Answer 2

Velocity at the end of 2 seconds is 23 metres per second.

Explanation:

Final velocity of an object equals initial velocity of that object plus acceleration of the object times the elapsed time.

V = u + at

v is final velocity, u is initial velocity, a is acceleration and t is time

V = 7 + (8*2)

  = 7 + 16

  = 23 metres per second

Final velocity = 23  ms–1