Recent content by siamak r

a tennis ball of mass m= 0.060 kg and speed v = 25 m/s strikes a wall at a 45 degree angle and rebounds with the same speed at 45 degree. what is the impulse ( magnitude and direction) given to the ball?

a particular car race can cover a quarter-mile track (402m ) in 6.40 s starting from a standstill. assuming the acceleration is constant, how many g's does the driver experience? if the combined mass of the driver and race car is 4850 kg, what horizontal force must the road exert on the tires?

a ball is kicked at ground level with a speed of 18.0 m/s at an angle of 35 to the horizontal. how much later does it hit the ground? i want to see the procedure