Question

A car increases its speed from 20kmph to 40kmph in 10 seconds. Find its acceleration.​

Answer 1

Answer: Acceleration= (final velocity - initial velocity)/2

Therefore acceleration in your case:

(V-u)/t

V=40kmph

U=20kmph

T=10s

Convert 40kmph and 20kmph to m/s

Approx values: v=10m/s

U=5m/s

Therefore

A=(10-5)/10

= 0.5m/s^2

Answer 2

Answer:

0.55m/s^2

Explanation:

20kmph=20000m/3600sec

=5.55... mps

40kmph=11.1.. mps

a=(V-U)/t

=(11.1.. -5.5.. )/10

= 0.55.. m/s^2