A body of mass 0.2kg is projected obliquely from a point on horizontal ground with a certain velocity.

At two Points A&B in its path,its velocitys are found to be 30m/s and 30(root3)m/s respectivly.

If these velociteis are perpendicular to each other, max. K.E of the body is:

a)6.75J

b) 67.5J

c)135J

d)1350J

Plz explain..

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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