posted by shiva .
an object accelerates uniformly along a straight line from a velocity of 10ms-1 until 25ms-1 in 5s.
a)the velocity of the object during the first 10s of motion
b)the time taken to reach a final velocity 50ms-1
V = 10 + 3 t
Initial velocity U=10m/s
Final velocity V=25m/s
Velocity V= 25m/s-10m/s=15m/s
(a) In 5s, the velocity v= 15m/s.
In 10s, the velocity
(b) V=50m/s a=dv/t=15m/s÷5s=3m/s^2