A car starts from rest and accelerates at 5 m/s2. At t=4 s, a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at t=6 s ? (Take g=10 m/s2)
1
20√2 m/s, 10 m/s2
2
20 m/s, 5 m/s2
3
20 m/s, 0
4
20√2 m/s, 0