Check m A system consists of three particles with these masses and velocities: mass 3.00 kg, moving north at 3.00 m/s; mass 4.00 kg, moving south at 4.40 m/s; and mass 7.00 kg, moving north at 2.00 m/s. What is the total momentum of the system? Take north as the positive axis. Enter a positive answer if the total momentum is due north and a negative answer if the total momentum is due south. An object of mass 7.40 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. kg . m/s What is the y-component of the object's change in momentum while it is in the air? Ignore air resistance. kg.m/s PhotoGrid Required information 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 3.70 s. Required information 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 3.70 s. At the end of the 3.70 s, what is magnitude of the object's final velocity? m/s What is the direction of the final velocity? Enter the angle in degrees where positive indicates north of east and negative indicates south of east. ! Required information 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 3.70 s. Required information A baseball player pitches a fastball toward home plate at a speed of 41.0 m/s. The batter swings, connects with the ball of mass 245 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 change in momentum during the 3.70 s? Take ty to be north and +x to be east. Enter a positive answer if the change in momentum is toward east and a negative answer if the change in momentum is toward west. kg.m/s 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 the ball and enter a negative value if the impulse is in the opposite direction the bat pushes the ball. kg.m/s 7 Assignment Save a CALL Check my Required information A baseball player pitches a fastball toward home plate at a speed of 41.0 m/s. The batter swings, connects with the ball of A frog is sitting on a lily pad when it sees a delicious fly. He darts out his tongue e darts out his tongue at a speed of 3.70 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 12.2 g. What is the recoil speed of the frog and the lily mass 245 g, and hits it so that the ball leaves the bat t after the collision with the bat with a speed of 37.0 m/s. Assume that the ball is moving horizontally Ignore drag forces on the pad due to t ust before and just after the collision with the bat. m/s If the bat and ball are in contact for 3.00 ms, what is the magnitude of the average force exerted on the ball by the bat? KN
