This is conservation of Momentum Joe and his brother Bo have a combined mass of 200.0 kg and are zooming along in a 100.0 kg amusement park bumper car at 10.0 m/s. They bump into Melinda's car which is sitting still. Melinda has a mass of 25.0 kg. After the collison, the twins continue ahead with a speed of 4.12 m/s. How fast is Melinda's car bumped across the floor? Please show work and explain why the answer is correct.

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

Suppose you are navigating a spacecraft far from other objects. The mass of the spacecraft is 3.0 x 104 kg (about 30 tons). The rocket engines are shut off, and you're coasting along with a constant velocity of km you briefly fire side thruster rockets, so that your spacecraft experiences a net force of N for 20 s. The ejected gases have a mass that is small compared to the mass of the spacecraft. You then continue coasting with the rocket engines turned off. Where are you an hour later? (Think about what approximations or simplifying assumptions you made in your analysis. Also think about the choice of system: what are the surroundings that exert external forces on your system?) Additional Materials eBook m

A rocket in space consumes fuel and oxidizer at the rate of 2.15 x 104 kg/s with an exhaust speed of 3.30 x 10 m/s. (a) Find the thrust (in N) produced by the rocket's engine. (b) Find the acceleration (in m/s2) of the rocket at liftoff from Earth's surface, if its initial mass was 3.00 x 10° kg. (Enter the magnitude.) m/s?

Question 4 parts a-c

A boy jumps straight up with an initial speed of 5.00 m/s. The boy’s mass is 60.0 kg, and the mass of the earth is about 6.00 x 1024kg. a. What is the initial recoil speed of the earth? b. How much time does it take for the two to reach their maximum separation? i.e., how long until the boy starts down? c. How far did the boy move in this time? d. How far did the earth move in this time?

What is the relation between A×B and BxA, The magnitudes are the same but they are in opposite directions, i.e., (Ã×B)=-(BxÃ) The order of the vectors in a cross product doesn't matter so they are the same, i.e., (ÃxB)=(BxÃ)

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

m V Question 3: The diagram below shows two carts moving in opposite directions on a frictionless surface. When the two carts collide they stick together. 6 m/s 1 m/s 4.0 kg 6.0 kg 4.0 Frictionless surface 4 a) Fill in the mvp table below for the collision: 4.0 kg-cart 6.0 kg cart two carts combined Р b) Which cart experiences a greater change of momentum during the collision? c) Which cart experiences a greater impact force during the collision? X.