Two remote control cars with masses of 1.15 kilograms and 1.98 kilograms travel toward each other at speeds of 8.41 meters per second and 3.97 meters per second, respectively. The cars collide head-on, and the less massive car recoils with a speed of 2.25 meters per second. a. What is the final speed of the second car?  b. How much kinetic energy is lost in this collision?

2. A 0.45-kg ball, moving east with a speed of 4.90 m/s, has a head-on collision with a 0.900-kg ball initially at rest. a. Draw a picture of the problem and write all the given quantities. b. Assuming a perfectly elastic collision, what will be the speed and direction of each object after the collision?

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Two cars (A and B) of equal mass have an elastic collision. Prior to the collision, car A is moving at 20 m/s in the +x-direction, and car B is moving at 10 m/s in the –x-direction.   A. Assuming that both cars continue moving along the x-axis after the collision, what will be the velocity (m/s) of car A after the collision?   B. Assuming that both cars continue moving along the x-axis after the collision, what will be the velocity (m/s) of car B after the collision?

A car is stopped for a traffic signal. when the light turns green, the car accelerates, increasing its speed from 0 to 4.90 m/s in 0.812 s. A. what is the magnitude of the linear impulse experienced by a 72.0 -kg passenger in the car during the time the car accelerates? B. what is the magnitude of the average total force experienced by a 72.0-kg passenger in the car during the time the car accelerates?

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A fireworks rocket is fired vertically upward. At its maximum height of 80.0 m, it explodes and breaks into two pieces, one with mass 1.20 kg and the other with mass mg = 0.220 kg. In the explosion, 950 J of chemical energy is converted kinetic energy of the two fragments. Part A What is the speed of each fragment just after the explosion? Enter your answers in meters per second separated by a comma. ? VA VB = m/s Submit Request Answer • Part B It is observed that the two fragments hit the ground at the same time. What is the distance between the points on the ground where they land? Assume that the ground is level and air resistance can be ignored. Express your answer in meters. να ΑΣΦ IB| = Submit Request Answer Provide Feedback

Tyrrell throws his 0.20 kg football in the living room and knocks over his mother’s 0.80 kg antique vase. After the collision, the football bounces straight back with a speed of 3.9 m/s, while the base is moving at 2.6 m/s in the opposite direction. How fast did Tyrrell throw the football?  Use g=9.8     a. 6.5 m/s b. 8.5 m/s c. 7.5 m/s d. 9.4 m/s e. 5.25 m/s

A 900 kg car is travelling north on Hwy 5 at a speed of 25 m/s. Another 900 kg car is travelling south on Hwy 5 at a speed of 25 m/s. a.    Do these cars have the same kinetic energy? Why or why not?b.    Do these cars have the same momentum? Why or why not?

A railroad car of mass 2.85 x 10^4 kg moving at 2.60 m/s collides and couples and with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at 1.20 m/s. A. what is the speed of the three coupled cars after the collision? B. how much kinetic energy is lost in the collision?