A 2.5-kg stone is released from rest and falls toward Earth. After 4.0 s, the magnitude of its momentum is: Group of answer choices 78 kg·m/s 98 kg·m/s 39 kg·m/s 0 kg·m/s 24 kg·m/s

A hungry 5.37 kg fish swimming at 1.86 m/s swallows a 0.96 kg fish that was swimming towards it at 2.98 m/s. What is the final speed (in m/s) of the formerly hungry fish?

A ball weighing 10 kg is initially at rest, then suddenly explodes into 3 pieces. The picture shows the length and direction for each one of the three velocities. What were the length and direct of the ball before the explosion? Hint : use the momentum conservation principle on the y axis and x axis.

(a) What is the momentum in kg · m/s of a garbage truck that is 1.00 ✕ 104 kg and is moving at 28.0 m/s?  _______ kg . m/s (b) At what speed in m/s would an 8.00 kg trash can have the same momentum as the truck? _______ m/s

Janet is skating at the ice rink with her little sister Sarah who is initially standing at rest on the ice. Janet then collides head-on into Sarah. Janet continues forward at 1 m/s, while Sarah is thrown backward at 3 m/s. (After the collision, Janet and Sarah are moving in the same direction). Janet’s mass is 55 kg and Sarah’s mass is 39 kg. How fast was Janet moving initially, in m/s?

A rubber ball with a mass of 0.110 kg is dropped from rest. From what height (in m) was the ball dropped, if the magnitude of the ball's momentum is 0.800 kg · m/s just before it lands on the ground?

At a particular instant, a moving projectile has a kinetic energy of 258 J and a momentum of magnitude 28.6 kg · m/s. (a)What is the speed (in m/s) of the projectile at this instant?  m/s (b)What is the mass (in kg) of the projectile at this instant?  kg

A constant net force of 14.3 N directed in the x-direction is exerted on a 2.2 kg object for a time of 1.49 s. What is the object's change in momentum during this time?

The table gives mass and speed data for the two objects in the figure. Find (a) the kinetic energy, (b) the magnitude of the momentum for object A and (c) the kinetic energy, (d) the magnitude of the momentum for object B. Object A Object B Mass 2.40 kg 5.00 kg Speed 5.00m/s 2.40m/s A 2.40 kg B 5.00 kg 5.00 m/s 2.40 m/s

What is the momentum in kg · m/s of a garbage truck that is 1.20 ✕ 104 kg and is moving at 35.0 m/s? At what speed in m/s would an 8.00 kg trash can have the same momentum as the truck?