Question

A golf ball (50 g) hit by a club is accelerated from rest to 50 m/s in 2.50 ms. What are the magnitudes of the impulse delivered to the ball and the average force acting on the ball? Impulse = Average Force = A disk of radius 10.0 cm spins about an axis through its center at a constant 5.0 rad/s. What is the linear velocity, centripetal and tangential accelerations of a point on its rim? linear velocity = centripetal acceleration = tangential acceleration = 3. Under what conditions is the linear momentum of a system conserved? (Do not state when the initial is equal to the final.) 4. A 1.50 kg point mass is 200.0 cm from a 3.00 kg point mass. Where is their center of mass, measured from the 1.50 kg mass? Xcm Starting from rest, a disk spins with a constant angular acceleration. After 2 minutes it has completed 50 revolutions. How many revolutions will it have completed at 4 minutes? a) 25 rev b) 71 rev c) 100 rev d) 200 rev

Answer 1

feel free to drop comment if you have any doubt. first question of the image posted is being answered here.

acceleration of the ball = 5o - o 2.5x103 G = 20000 mg average = ma = 50x10 3 x 20000 = 1000 W/ansmes. Impulse = faverage xt = 1000 x 2.5x10-3 = 2.5 N-8 panhnen,