Sand is dumped onto a conveyor belt. If it lakes a force F 50 N to keep the belt

Question

Sand is dumped onto a conveyor belt. If it lakes a force F 50 N to keep the belt running at a constant linear speed of 5 m s. how much sand is added to the belt per second? Glider B rests on a long air track. Glider A (m_A - (2/3)mM) is given an initial velocity V toward glider B. The two gliders make a perfectly inelastic collision. What are their velocities after the collision? A 0.25-kg super ball strikes a wall with a velocity of 8.0 m s at an angle of 603. (See figure below.) It bounces off with the same speed and angle. If the ball was in contact with the wall for 0.010 s. what was the average force exerted on the wall by the ball? In a game of pool, the cue ball has an initial velocity of 4.0 before it collides with a stationary eight ball. After the collision, the eight ball moves with a velocity of2.S m's at an angle of 42s from the initial velocity. What are the magnitude and direction of the cue ball's final velocity? (Assume conservation of momentum and equal masses.) What percent of the system's kinetic energy is lost in this collision?

Explanation / Answer

Ans 1)

F=50 N

V2=5m/s

let mass added per second be x kg/s

the force 50N is required to run the belt with sand

so Fprce=momentum/time = mass*velocity/time

Hence Mass/time= Force/velocity = 50/5 = 10Kg/s

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