Explanation:
Just remember the formula of acceleration is
acceration= [tex] \frac{v - u}{t} [/tex]
so...
1st one is done...
Initial velocity (u) = 0m/s (It was in rest)
Final velocity (v) = 60m/s
Time (t) = 10s
acceleration (a) = ?
(Remember to always change the units into SI before solving)
Now,
(use the formula)
a = (60-0/10) m/s^2
= 60/ 10 m/s^2
= 6m/s^2
6.
(from 0m/s) so initial velocity (u) =0m/s
(to 40 m/s) so final velocity (v) = 40m/s
time (t) = 4 seconds
acceleration (a) = ?
Now,
a= ( 40-0/4 ) m/s^2
= 40/4 m/s^2
= 10m/s^2
