a child runs at 4.0 m/s and jumps onto a sled, initially at rest. If the child's mass is 36 kg, and if the child and sled slide off together at 3.0 m/s after the collision the sled's mass is

During a game of football, a 108 kg player running at a speed of 9.1 m/s is tackled from the front by a 91 kg opponent at a speed of 6.3 m/s. What is the speed of the pair of players immediately after the collision (assuming the players are glued together)?

A 2,300-kg car moving east at 10.0 m/s collides with a 3,000-kg car moving north. The cars stick together and move as a unit after the collision, at an angle of 33.0° north of east and at a speed of 5.17 m/s. Find the speed of the 3,000-kg car before the collision.

A 1.825-kg falcon catches a 0.570-kg dove from behind in midair. What is their velocity after impact if the falcon’s velocity is initially 28.5m/s and the dove’s velocity is 8.0m/s in the same direction?

Two carts are involved in an elastic, head on collision. Cart A has a mass of mA = 1.5mB, and initial velocity of vAi = 4.5 m/sto the right. Cart B has an initial velocity of vBi = 0m/s and a final velocity ofvBf = 2m/sto the right after the collision. a) What is the final velocity of cart A? b) What is the mass of cart B?

A 1000-kg car approaches an intersection traveling north at 20.0 m/s. A 1200-kg car approaches the same intersection traveling east at 22.0 m/s. The two cars collide at the intersection and lock together. Ignoring any external forces that act on the cars during the collision, what is the velocity of the cars immediately after the collision? 15.1 m/s in a direction 52.8° east of north O 21.1 m/s in a direction 47.7° west of south O 21.1 m/s in a direction 47.7° east of north O 29.7 m/s in a direction 47.7° east of north O 21.1 m/s in a direction 52.8° east of north

An Amazon package of mass 2 kg is released from rest at an Amazon warehouse loading dock and slides down a 3.0-m-high, frictionless chute to a waiting truck. Amazon warehouse workers have no breaks, but the truck driver really needed to use the restroom, so he sneaked out without having removed the previous package, of mass m, from the bottom of the chute. Suppose the packages stick together. If their common speed after the collision is 3 meters per second, what is the mass of the package at the bottom of the chute?

An 250 kg bumper car going 15.9 m/s has a 1d elastic collision with a 200 kg stationary bumper car.  How fast would the 200 kg bumper car be going after the collision in m/s?

An air hockey puck is moving with a velocity of 2 in/sec towards a second puck that is at rest. After the two pucks collide, the first puck reverses direction and moves at 0.7 in/sec. If the pucks have the same mass, what is the velocity of the second puck after the collision in m/s? Assume the air hockey table has no friction and that all of the motion is in one dimension.

What is the velocity of a 900-kg car initially moving at 30.0 m/s, just after it hits a 150-kg deer initially running at 12.0 m/s in the same direction? Assume the deer remains on the car. What type of collision is in this problem? elastic, inelastic, plastic, deadly