Question

A car moving at a speed of 10 m/s enters a Q. highway and accelerates at 4 m/s2. How fast will the car be moving after it accelerated for 60m?
answer choices
580 m/s
4.8 m/s
24 m/s
480 m/s m​

Answer 1

• Initial velocity=u=10m/s
• Final velocity=v
• Acceleration=a=4m/s^2
• Distance=s=60m

According to third equation of kinematics

$\\ \rm\rightarrowtail v^2=u^2+2as$

$\\ \rm\rightarrowtail v^2=10^2+2(4)(60)$

$\\ \rm\rightarrowtail v^2=100+480$

$\\ \rm\rightarrowtail v^2=580$

$\\ \rm\rightarrowtail v\approx 24m/s$