Write answers within the space provided under the question :
Name of the type of force acting :
A ball rolling along the ground

Name the unbalanced force that stops a ball rolling on the ground.

A hocket ball at rest is hit by a stick such that the force acts on the ball for 0.15 s. IF the ball is of mass 100g and covers a distance of 100m in 2 seconds, find the magnitude of the force applied by the hocket stick. Assume no friction is acting on the ball while rolling on the ground.

Rain drops fall from a certain height with a terminal velocity v on the ground. The viscous force is F=5pi nerv Hence ne is coefficient of viscosity r the radius of rain drop and v is speed Then work done by all the forces acting on the ball till it reaches the ground is proportional to :

A small ball of density rho is placed from the bottom of a tank in which a non viscous liquid of density 2 rho is filled . Find the time taken by the ball to reach the surface of liquid and maximum height reached above the bottom of container . (Size of the ball and any type of drag force acting on the ball are negligible )

Name the type of simple pulley that can act as a force multiplier.