Kinematics Numerical5(Car, time, velocity)
Kinematics Numerical 5: A car traveling at 10 ms accelerates uniformly at -22 ms . Calculate its velocity after 5 s.
Here we have data;
Initial velocity =Vi= 10m/sec
Acceleration = a= 2 m/sec.sec
Time taken = t = 5 sec
Final velocity = Vf = ?
i-e car motion was noted from a point where its velocity was 10 m/sec and hence the same is taken as initial velocity .Then velocity was changed at rate of 2 m/sec and 5 sec passed . Whatever be the velocity just after 5 sec is taken as final velocity — the same we have to calculate!
We know the formula for final velocity;
\[ Vf= Vi+at \]
Putting values ;
\[ Vf= 10+(2)5=10+10=20 m/sec \]
So the velocity — or final velocity after 5 seconds is 20 m/sec