A sports physicist studies the act of catching a baseball. If a pitcher throws a 145 gm baseball at 300 m/s, how fast will a catcher with a mass of 90 kg be rocked backwards when catching it?

a 1.2 baseball moving westward at 14m/s is hit by a bat that delivers an eastward impulse of 24 kgm/s to the ball. what is the speed of the ball after this collision?

A 4900 kg open train car is rolling on frictionless rails at 18.6 m/s when it starts pouring rain. A few minutes later the car's speed is 15.4 m/s. What mass of water (in kg) has collected in the car?

In this problem, an astronaut is landing on the 6.1×1021 kg asteroid traveling at 9830 m/s and detonates a nuclear bomb. The asteroid will break into two pieces of equal mass. One piece will fly off at an angle of 30∘ and speed 9700 m/s. What will be the speed and angle of the second piece?

There is a large crater in Arizona called Meteor Crater. It is estimated that it was formed about 20,000 years ago by a meteorite that had a mass of about 5 x 10^10 kg and was traveling at a speed of 7.5 km/sec. How fast could this meteorite have hit the Earth (whose mass is 6 x 10^24 kg) if we assume a head-on collision?

An astronaut of mass 65.0 kg is at rest relative to her space vehicle with nothing behind her except the empty,dark, vacuum of space. Another astronaut decides to play a practical joke on her and throws a 10.0 kg anvil(because those are totally used in space) at her with a velocity of 3.00 m/s. How fast do she and the anvil moveonce she catches it? Just to lower your anxiety, there is a way for her to get back to the space vehicle

The figure below shows a person in a canoe on a lake. The person's mass is 68 kg, and the canoe's is 135 kg. The person and canoe are initially at rest when the person throws a package of mass  m = 15 kg  horizontally to the right with a speed of  vi = 4.0 m/s.  What is the velocity of the canoe 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.) A person in a canoe throws a package of mass m to the right with velocity vector vi. magnitude m/sdirection

Two ice skaters stand facing each other at rest on a frozen pond. They push off against one another and the 48 kg skater acquires a speed of 0.69 m/s. If the other skater acquires a speed of 0.84 m/s, what is her mass in kilograms?

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.

A loaded gun is dropped on a frozen lake. The gun fires, with the bullet going horizontally in one direction and the gun sliding on the ice in the other direction. The bullet's mass is 0.03 kg, and its speed is 280 m/s. If the gun's mass is 1.8 kg, what is its speed (in m/s)?