A 1.8 kg block slides along a frictionless surface at 2.0 m/s , A 2nd block is moving at -8.0m/s and collides with it and sticks. The final velocity is -2.0m/s what was the mass of the 2nd block?

A 10.0 kg object moving 20.0m/s South crashes inelastically into a 25.0 kg object at rest. Find the final velocity.

A 2.5 kg car is moving towards the right at 4 m/s collides head-on with 6.5 kg car moving towards the left at 2 m/s, and they stick together. What is the velocity of combined cars after the collision?

Two football players collide head-on in midair while chasing a pass. The first player has a 100.5 kg mass and an initial velocity of 4.20 m/s, while the second player has a 122 kg mass and initial velocity of -3.9 m/s. What is their velocity (in m/s) just after impact if they cling together? (Indicate the direction with the sign of your answer.) m/s

Two football players collide head-on in midair while chasing a pass. The first player has a 95.0 kg mass and an initial velocity of 5.60 m/s, while the second player has a 114 kg mass and initial velocity of -3.7 m/s. What is their velocity (in m/s) just after impact if they cling together? (Indicate the direction with the sign of your answer.) m/s?

A 1,120-kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the rear end of a 9,100-kg truck moving in the same direction at 20.0 m/s (see figure below). The velocity of the car right after the collision is 18.0 m/s to the east. +25.0 m/s +18.0 m/s +20.0 m/s After Q (a) What is the velocity of the truck right after the collision? (Round your answer to at least three decimal places.) x m/s (east) Before (b) How much mechanical energy is lost in the collision? x) Account for this loss in energy

A 0.003 - kg bullet traveling 400. m/s penetrates a 2-kg block of wood and emerges cleanly at 200. m/s. If the block is stationary on a frictionless surface when hit, how fast (in m/s) does the block  move after the bullet emerges?

A 9.97 kg red car traveling 7.71 m/s to the right collides with a 17.33 kg blue car traveling 7.19 m/s to the left.  What is the velocity of the two cars after the inelastic collision?  Round your answer to 2 decimal places.

A 1,270-kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the rear end of a 8,900-kg truck moving in the same direction at 20.0 m/s (see figure below). The velocity of the car right after the collision is 18.0 m/s to the east. +25.0 m/s +20.0 m/s +18.0 m/s Before After (a) What is the velocity of the truck right after the collision? (Round your answer to at least three decimal places.) m/s (east) (b) How much mechanical energy is lost in the collision? Account for this loss in energy.

A 727.43-kg car traveling east at 24.29 m/s collides with a 549.01-kg car traveling north at 12.42 m/s. What is the final speed of the cars if they stick together.