The owner’s manual of a car suggests that your seat belt should be adjusted “to fit snugly” and that the front seat head rest should not be adjusted so that it fits comfortably at the back of your neck but so that “the top of the head rest is level with the top of yours ears.”How do Newton’s laws support these good recommendations?

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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