6.Speeds of two identical cars are u and 4u at a specific instant. The ratio of the respective distances at which the two cars are stopped from that instant is:

7.If the acceleration of a particle is the function of distance as a = f (x), then:

8.In the previous problem, the distance traveled by the particle during the time interval of 4s is:

9.A 2m wide truck is moving with a uniform speed v = 8 m/s along a straight horizontal road. A pedestrian starts to cross the road with a uniform speed v when the truck is 4m away from him. The minimum value of v so that he can cross the road safely is:

10.A particle starts from rest with acceleration 2 m/second square. The acceleration of the particle decreases down to zero uniformly during time-interval of 4 s. The velocity of particle after 2s is: