A 40-kg football player leaps through the air to collide with and tackle a 60-kg player heading toward him, also in the air. If the 40-kg player is heading to the right at 7 m/s and the 60-kg player is heading toward the left at 3 m/s, what is the resulting speed of the tangled players?

a cheetah jumps straight up in the air to catch a bird (with a mass of 100g )at the peak of its jump. if the vird is  moving with a speed of 6.9 m/s when the cheetah catches it and the cheetah and bird move together at 0.20m/s after the cath, what is the mass of the cheetah?

A truck with a mass of 1570 kg and moving with a speed of 17.5 m/s rear-ends a 652 kg car stopped at an intersection. The collision is approximately elastic since the car is in neutral, the brakes are off, the metal bumpers line up well and do not get damaged. (a) Calculate the initial momentum of the truck (in kg m/s). kg m/s (b) Calculate the final velocities (in m/s) for the truck and the car. Vf = m/s Vf = m/s (c) Calculate the total momentum (in kg m/s) of the truck AND the car after the collision. kg m/s (d) Did you expect the results that you got for Part (a) and (c)? O No, since kinetic energy may not be conserved. O Yes, since the collision is inelastic. O No, since there were no forces acting on either the car or the truck during the collision. O Yes, since momentum is conserved in a collision with no external forces acting on the colliding objects.

A truck with a mass of 1480 kg and moving with a speed of 17.0 m/s rear-ends a 732 kg car stopped at an intersection. The collision is approximately elastic since the car is in neutral, the brakes are off, the metal bumpers line up well and do not get damaged. (a) Calculate the initial momentum of the truck (in kg m/s).  kg m/s (b) Calculate the final velocities (in m/s) for the truck and the car. vtf= m/svcf= m/s (c) Calculate the total momentum (in kg m/s) of the truck AND the car after the collision.  kg m/s (d) Did you expect the results that you got for Part (a) and (c)? Yes, since the collision is inelastic. No, since there were no forces acting on either the car or the truck during the collision.      Yes, since momentum is conserved in a collision with no external forces acting on the colliding objects. No, since kinetic energy may not be conserved.

A 0.20-kg model railroad car moving with a speed of 0.20 m/s is struck from behind by an 0.42-kg model locomotive moving along the same line with a speed of 0.50 m/s. If they stick together after thecollision, what is their velocity?

A 83.7 kg linebacker (X) is running at 6.59 m/s directly toward the sideline of a football field. He tackles a 90.4 kg running back (O) moving at 9.49 m/s straight toward the goal line, perpendicular to the original direction of the linebacker. As a result of the collision, both players momentarily leave the ground and go out-of-bounds at an angle o relative to the sideline, as shown in the diagrams. Before impact After impact What is the common speed vf of the players immediately after their impact? UF = m/s What is the angle ø of their motion relative to the sideline? $ =

Yong had stopped his cart which has a mass of 500 kg  just before a 30degree hill covered in ice. He was stuck from behind by a 1500 kg coach with a mass of1500 kg which is travelling at 20 m/s. The two vehicles stuck together and slid up the hill. How far up the slope did they go?

please answer the following A running back with a mass of 76 kg and a speed of 9 m/s collides with, and is held by, a 114-kg defensive tackle going in the opposite direction. How fast must the tackle be going before the collision for their speed afterward to be zero?