1- An object of mass 7.60 kg is projected into the air at a 55.0 angle. It hits the ground 3.40 s later. Set "up" to be the positive y-direction. What is the y-component of the object's change in momentum while it is in the air? Ignore air resistance.

find the kgm/s

2-

A 3.00-kg object is initially moving northward at 15.0 m/s. Then a force of 15.0 N, toward the east, acts on it for 5.00 s.

What is the direction of the final velocity?Enter theangle in degrees where positive indicates north of east and negative indicates south of east. Find the degree

3- A baseball player pitches a fastball toward home plate at a speed of 41.0 m/s. The batter swings connect with the ball of mass 315 g, and hits it so that the ball leaves the bat with a speed of 37.0 m/s. Assume that the ball is moving horizontally just before and just after the collision with the bat.

What is the impulse delivered to the ball by the bat? Enter a positive value if the impulse is in the direction the bat pushes theball and enter a negative value if the impulse is in the opposite direction the bat pushes theball.

find the kgm/s

4- A frog is sitting on a lily pad when it sees a delicious fly. He darts out his tongue at a speed of 8.30 m/s to catch the fly. The tongue has a mass of 0.410 g, and the rest of the frog plus the lily pad have a mass of 12.2g. What is the recoil speed of the frog and the lily pad? Ignore drag forces on the pad due to the water.

find the m/s

5-A 50.0-kg astronaut is in space, far from any objects that would exert a significant gravitational force on him. He would like to move toward his spaceship, but his jet pack is not functioning. He throws a 0.720-kg socket wrench with a velocity of 5.00 m/s in a direction away from the ship. After 0.500 s, he throws a 0.800-kg spanner in the same direction with a speed of 8.00 m/s. After another 9.90 s, he throws a mallet with a speed of 6.00 m/s in the same direction. The mallet has a mass of 1.20kg. How fast is the astronaut moving after he throws the mallet?(assume all speeds are relative to the spaceship).

find the m/s

6-Particle A has a mass of 5.40 g and particle B has a mass of 1.80 g. Particle A is located at the origin and particle B is at the point (x, y) = (25.0 cm, 2.00 cm).

What is the y-component of the CM?

7- For a system of three particles moving along a line, an observer in a laboratory measures the following masses and velocities. What is the velocity of the CM of the system? Enter a positive value if thevelocity of the CM of the system is in the +x direction and enter a negative value if thevelocity of the CM of the system is in the -xdirection.

Mass (kg)	vx (m/s)
3.20	295
5.0	120
2.0	+52