Two carts are sitting, stationary on a level surface, connected by a compressed spring. Cart 1 has three times as much mass as cart 2. The spring connecting the 2 carts is released. Which of the following statement is true? A. Cart 2 has 3 times as much momentum after the push B. The total momentum of he two carts after the spring is released is zero

Course A lighter block and a heavier block sit on a frictionless surface. Please answer the following questions about the final momenta and kinetic energies of the blocks for the given situations. Both blocks are initially at rest. The same force F then pushes to the right on each block for 1 meter. Which block has the larger final kinetic energy after the force acts? lighter same heavier insufficient information Submit Answer Tries 0/2 Which block has the larger final momentum after the force acts? lighter same heavier insufficient information

Help with #26. Thank you

A rocket is propelled forward as very high speed gases are ejected out of its back. Which one of the following is the best explanation as to why the rocket is propelled forward? The high speed gases push on the rocket as they are ejected and propel it forward. B) The rocket is propelled forward because both energy and momentum must be conserved. The rocket is propelled forward due to the conservation of momentum. Because the gases are pushing against the air, the air propels the rocket forward.

Boxing gloves are padded to lessen the force of a blow. The glove and face compress 7.50 cm during a blow in which the 7.00-kg arm and glove are brought to rest from an initial speed of 10.0 m/s. Think & Prepare 1. Make note of what's given and what's unknown. Relate known quantities to symbols. 2. Draw a labeled sketch if possible. 3. Identify the physics principle and approach. Write down relevant equations symbolically. Simplify if possible. 4. Insert numerical quantities to solve for unknowns. 5. Does the answer make sense? (a) Calculate the change in kinetic energy of the glove and arm. Enter to 3 significant figures AKE= J Note: AKE = KE final-KE initial (b) Where does this energy go? O into doing work against the force exerted by the face against the glove O into doing work against gravity O into the potential energy of the face O into the potential energy of the glove and arm (c) Calculate the force exerted on the boxing glove by the opponent's face. Consider the relative…

2 Two wooden pucks approach each other on an ice rink as shown in the figure. Puck #2 has an initial speed of 4.28 m/s and a mass that is some fraction f = 3 that of puck #1. Puck #1 is made of a hard wood and puck #2 is made of a very soft wood. As a result, when they collide, puck #1 makes a dent in puck #2 and 16.2% of the initial kinetic energy of the two pucks is lost. Before the collision, the two pucks approach each other in such a manner their momentums are of equal magnitude and opposite directions. Determine the speed of the two pucks after the collision. V1f= V2f m/s m/s Puck #1 40° 40° Puck #2

8. You are sitting in a sled, at rest on a pond covered with nice, thick, frictionless ice. Your own mass is 3.3 kg, and the sleds mass is 10.1 kg. You start at rest, and then you jump off the sled, after which the empty sled is traveling at a speed of 5.48 m/s. What will be your speed on the ice after jumping off?      0.38 m/s      1.22 m/s      0.99 m/s      0.76 m/s

3. Coal miners love physics, and in their spare time, they like to do physics experiments. One popular experiment involves using a sling shot to shoot lumps of coal into coal carts and seeing how far the carts move along the track as a result. One particular miner shoots a 5.0-kg lump of coal horizontally off a 10-m high ledge into a 90-kg cart waiting below, as shown. If the lump of coal has an initial speed of 30 m/s and the cart moves 0.80 m after the coal lands inside it, how much work did the friction between the cart and the track do on the cart? Also, what is the coefficient of kinetic friction between the cart and the track? Hint: you can assume that friction is the only force acting on the cart in the horizontal direction.

B Two balls roll horiztonally off the edge of a 1.29 m tall table. Ball A has a mass of 2.4 kg and is moving at 1.4 m/s when it leaves the table. Ball B has a mass of 4.9 kg and is moving at 7.7 m/s when it leaves the table. Both balls leave the table at the same instant. Which ball hits the ground first? Ball B Same Time O Ball A Cannot Tell How much time does it take Ball B to hit the ground after leaving the table? How far from the edge of the table does Ball A land? (horizontal distance) m How far from the edge of the table does Ball B land? (horizontal distance) m

A 0.508 kg ball, initially moving with a speed of 3.3 m/s bounces off a wall and then moves with a speed magnitude half of its original directed in the opposite direction. If the ball is in contact with the wall for 5.8 m/s, what is the magnitude of the average force that the wall exerts on the ball? A. 147.32 N B. 433.55 N C. None of the above