Question

4.) If a belt is moving between two wheels is moving with a speed of 10m/s, what is the angular velocity of the smaller wheel? R1- 10cm o R2 = 55cm 5.) If a 60g ball hits the floor traveling with a speed of 6m/s and rebounds with a speed of 4m/s, what is the magnitude of the average impulse provided by the floor on the ball? 6.) A NASCAR racer is traveling with an initial angular velocity of 0.105 rad/s around a circular track with a radius of 382m. A) Calculate the linear velocity of this car. B) Calculate the time it takes to make 1 rev.

Answer 1

4) @a 155cm] =R2 R,=10cm of smaller wheel yet wo be angular velocity WIRI=V (V=10m/s) Wix 10x10² =10 100 rad's W = 5) m=60g o į viz 6m/s o ↑ Vf zumis Impulse in momentum = Change - рі Mf = 2.4 kgm/s -60. 6 -306 Kgimis mpf = 60 x4 100 Mf a Final momentum - m Vi 100 Mi 2.4 -1-3.6) Mf - Mi Impulse Impulse 6 kg m/s 6) Angular velocity is given ie w=0,105 rad/s v=WR 0.105 X 382 = 40.11 m/s 40.11 m/s linear speed

B) Time 2017 Time 27 0.105 Time - 59.83 sec C 101