Question

If a car changes its speed from 20m/s to 40m/s in just 10 sec, what is the average velocity of the car? ( COMPETE ANSWER)

Answer 1

Answer:

30 m/s

Explanation:

ATQ,

u = 20 m/s

v = 40 m/s

t = 10 s

a = (v - u) / t

a = 20 / 10 = 2 m/s^2

Now,

s = ut + (1/2) (at^2)

s = 20 * 10 + 1/2 * 2 * 10^2

s = 200 + 100

s = 300 m

Avg. velocity = 300 / 10 = 30 m/s

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