A physical quantity x being calculated by measuring y and z and using the formula x=y*z. In a particular set of values, the value of y is measured with an error of +10%, whereas the value of z is measured with an error of -10%. For this particular set of values, the error in the calculation of x will be

(1) 0%

(2) 20%

(3) -1%

(4) 10%

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.

11

21

31

41