Question

A car travelling at 30m/s , accelerates at the rate10$m/s^2$ for 4 seconds. The final velocity after 4 second will be( in m/s)

• A. 30
• B. 96
• C. 70
• D. 100

Answer 1

The correct option is C

70

u =30 m/s

$a=10m/s^2$

t =4 sec

v =u+at

$=30+(10\times 4)$

=70 m/s.