Two projectiles are launched from a 35 meter ledge as shown in the diagram. One is launched from a 37 degree
angle above the horizontal and the other is launched from 37 degrees below the horizontal. Both of the launches
are given the same initial speed of v0 = 50 m/s.
Projectile 2
Projectile 1
35 m
The di erence in the times of
ight for these two projectiles, t1 􀀀 t2, is closest to
(A) 3 s
(B) 5 s
(C) 6 s
(D) 8 s
(E) 10 s

Three identical balls are placed on a frictionless horizontal surface touching each other. They stick to each other because of adhesive. Another ball of same radius and mass m is placed over the void created by the three balls. Find the forces applied by the balls kept on the floor to each other if the system remains in equilibrium.

A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.

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