A particle of mass 70 g, moving at 50 cm/s , is acted upon by a variable force opposite to its direction of motion. The force F is shown as a function of time t

(a) its speed will be 50 cm/s after the force stops acting
(b) its direction of motion will reverse
(c) its average acceleration will be `1 m//s^2` during the interval in which the force acts
its average acceleration will be `10 m//s^2 ` during the interval in which the force acts

Options

A. c, d are correct
B. b, c are true
C. a, b are true
D. a, c are true

Answer

C