art with a mass of 50 g is thrown at 15 m/s and sticks into a 100-g apple hanging on a string. What is the velocity of the dart and apple just after the dart is embedded? A.0 m/s B.10 m/s C.5 m/s D.15 m/s

Two ice skaters push off against one another starting from a stationary position. The 45-kg skater acquires a speed of 0.375 m/s. What speed does the 60-kg skater acquire? a. 0.21 m/s b. 0.55 m/s c. 0.28 m/s d. 0.14 m/s

9. A 2500 kg truck moving at 10.00 m/s strikes a car waiting at a traffic light, hooking bumpers. The two continue to move together at 7.00 m/s. What was the mass of the struck car? A. 1730 kg B. 1550 kg C. 1200 kg D. 1070 kg E. 967 kg

A. 3.850 Rg m/s D. 4.113 kg-m/s 4.823 kg-m/s B. 4.730 kg-m/s E. C. 5.476 kg-m/s F. 3.735 kg-m/s 1--1 IZJXM A toy train engine (2.1 kg) is moving 0.28 m/s to the right when it collides with a train car (3.2 kg) moving 0.19 m/s in the opposite direction, and they stick together. Find the velocity of the engine-car combination as they move off together. Assume "to the right" is the positive direction. 3. A. -0.00267 m/s D. -0.006516 m/s -0.005211 m/s B. E. -0.002181 m/s -0.003774 m/s C. F. -0.006594 m/s 1--1 [carpet-14]

A 7400 kg truck traveling along a straight road at 14 m/s comes to a stop and remains stationary for several minutes. It then accelerates backward in reverse until it reaches 5.0 m/s in the opposite direction. What is the magnitude of the change in momentum of the truck for this entire process? A. 100,000 kg. m/s B. 140,000 kg. m/s C. 67,000 kgm/s D. 37,000 kgm/s O C O B OD O A

A cylinder sits on top of a cube.  How far above the table's surface is the center of mass of the combined object.

I need help with these questions and I need an explanation Is the answer for 8: A. -20 m/s/s B. 3.33 m/s/s C. -6.7 m/s/s D. 20 m/s/s Is the answer for 6: A. 8 m/s B. 40 m/s C. 20 m/s

A miniature spring-loaded, radio-controlled gun is mounted on an air puck. The gun’s bullet has a mass of 5.00 g, and the gun and puck have a combined mass of 120 g. With the system initially at rest, the radio controlled trigger releases the bullet causing the puck and empty gun to move with a speed of 0.500 m/s. What is the bullet’s speed? a. 4.80 m/s.        b. 11.5 m/s          c. 48.0 m/s                    d. 12.0 m/s