If a particle starts from rest and accelerates according to

If a particle starts from rest and accelerates according to the graph shown, the particle\'s velocity at t = 20 s is A) 200 m/s B) 100 m/s C) 0 D) 20m/s. The particle in Problem 1 stops moving at t =. A) 10 s B) 20 s c) 30 s D) 40 s

Solution

1-B

2-C

Area under graph gives change in velocity

Area of triangle = 20*10/2=100 m/s