This is a Science question pls help give 15 coins for answer

Four potential forces can act on the ball. which combination of forces will keep the ball in static equilibrium? the length of the arrows represents the magnitude of the force.

Abody of weight 60 kg is standing in a lift the lift going upward with a uniform velocity of 4.9 metre per second slows down and stops in two seconds then apparent weight of the body during the slow down process is

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec