A small dog jumps straight up into the air to catch a Frisbee (mass 143 g) at the peak of its jump. If the frisbee is moving with a speed of 12.1 m/s when the dog catches it, and the dog and frisbee move off together at 0.74 m/s after the catch, what is the mass (in kg) of the dog?

A freight train is being assembled in a switching yard and the figure shows two box cars. Car 1 has a mass of 75000 kg and moves with a velocity of 0.8 m/s. Car 2 has a mass of 93000 kg and a velocity of 1.1 m/s. Car 2 overtakes and couples with car 1. (a) Before (b) After Neglecting friction find the common velocity of the cars after they become coupled. vf= m/s

The figure below shows a fisherman in a boat on a lake. The fisherman's mass is 77 kg, and the boat's is 132 kg. The fisherman and boat are initially at rest when the fisherman throws a package of mass m = 15 kg horizontally to the right with a speed of v; = 4.6 m/s. What is the velocity of the boat after the package is thrown? Neglect any resistance force from the water. (Give the magnitude in m/s, and select the correct direction from the options given.) magnitude direction ---Select--- m/s m V;

A rocket-powered sled sits on a frozen lake bed. The sled has a mass of 210 kg, and the combusting rocket fuel has a mass of 8 kg. In a simplified analysis, we assume that as a result of combustion, the rocket fuel is fired backward at a speed of 160 m/s. What final speed does the sled achieve?

Godzilla is fighting Mothra in Tokyo (again). Godzilla climbs a tall building and, while standing on the top of the building, Mothra slams into him at a speed of 460 m/s. Godzilla grabs onto Mothra during the impact and they are thrown from the top of the building. If Godzilla has a mass of 9.6 * 103 kg and Mothra has a mass of 3.2 * 103 kg, how fast are the two monsters going as they pitch from the top of the building?

An automobile with a total mass of 1500 kg is placed on a moving flatbed railcar. The flatbed is 1.20 m above the ground. The railcar is moving eastward at a constant speed of 8.2 m/s and has a mass of 38000 kg. The car accelerates westward and when it leaves the flatcar it is traveling at 23.0 m/s relative to the ground. (a) What is the speed of the railcar when the car leaves? (b) What is the distance between the car and the west end of the flatcar, when the car touches the ground?

A man holding a rock sits on a sled that is sliding across a frozen lake (negligible friction) with a speed of 0.490 m/s. The total mass of the sled, man, and rock is 94.0 kg. The mass of the rock is 0.270 kg and the man can throw it with a speed of 15.5 m/s. Both speeds are relative to the ground. Determine the speed of the sled (in m/s) if the man throws the rock forward (i.e., in the direction the sled is moving). m/s Determine the speed of the sled (in m/s) if the man throws the rock directly backward. m/s

An astronaut finds herself in a predicament in which she has become untethered from her shuttle. She figures that she could get back to her shuttle by throwing one of three objects she possesses in the opposite direction of the shuttle. The masses of the objects are 5.4 kg, 7.9 kg, and 10.1 kg, respectively. She is able to throw the first object with a speed of 15.00 m/s, the second with a speed of 14.2 m/s, and the third with a speed of 7.0 m/s. If the mass of the astronaut and her remaining gear is 75.0 kg, determine the final speed of the astronaut with respect to the shuttle if she were to throw each object successively, starting with the least massive and ending with the most massive. Assume that the speeds described are those measured in the rest frame of the astronaut.

Suppose that a garbage truck is 1.35 × 104 kg and is initially moving at 24.5 m/s. What is the speed of the garbage truck, in meters per second, just after it hits and adheres to a trash can that is 195 kg and initially at rest?

A rocket, which consists of two parts or stages, is travelling at 8.80 km/s. The first stage of the rocket, which has an approximate mass of 856 kg is ejected from the second stage and it will travels at 4.80 km/s. The second stage of the rocket has a mass of 468 kg. What is the velocity of the second stage just after the first stage is released? Give your answer in km/s to 2 decimal places