A body moving in a straight line at 72kmph undergoes an acceleration of 4m/s 2 . Find its speed after 2 seconds.
Dear student
Answer to first question is as follow:-
Initial velocity, u = 72 kmph = 20 m/s
Acceleration, a = 4 m/s2
Time, t = 2 s
Final velocity, v = ?
We know,
v = u + at
= > v = 20 + 2 X 4
= > v = 28 m/s
Please post different questions in separate thread.
Regards