A man with a parachute is bailed out at a height of 400 m. I f time taken foer 1st 200 m fall is t1 and for 2nd 200 m fall is t2, then

1)t1

2)t1>t2

3)t1=t2

4)information is not sufficient

please give a short explanation too.

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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