Question

initial speed is 50 km/h, final speed is 20 km/h and time is 10 sec. Find acceleration?
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Answer 1

Explanation:

v=50km/h=180m/s.

u=20km/h=72m/s.

t=10s.

a=?

a=(v-u)/t

a=(180-72)/10

a=10.8m/s^2.

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Answer 2

hello dear!!

initial speed,u= 50 km/h=13.8m/s

final speed,v=20 km/h=5.5m/s

time,t=10 sec

Acceleration, a = ? (to be calculated)

V = u +at

5.5= 13.8 + a x 10

-10a = 13.8 - 5.5

=8.3

a =8.3/-10

=-0.83m/s²