1. A baseball pitcher brings his arm forward during a pitch, rotating the forearm about the...

  

Transcribed Image Text:

1. A baseball pitcher brings his arm forward during a pitch, rotating the forearm about the elbow. If the velocity of the ball in the pitcher's hand is 38.0 m/s and the pitcher's forearm is 0.300 m long, what is the angular velocity of the forearm? Hint: Drawing a small cartoon could be helpful. Enter to 3 significant figures W3 rad/s 1. The propeller of a World War II fighter plane is 2.40 m in diameter. (a) What is its angular velocity in radians per second if it spins at 1150 rev/min? Enter to 3 significant figures rad/s (b) What is the linear speed of its tip at this angular velocity if the plane is stationary on the tarmac? Enter to 3 significant figures v= m/s (c) What is the centripetal acceleration of the propeller tip under these conditions? Calculate it in meters per second squared Enter to 3 significant figures ac= m/s Compare the centripetal acceleration to the acceleration due to gravity g. Is the centripetal acceleration very large or very small compared to g? Enter to 3 significant figures ac g 1. A baseball pitcher brings his arm forward during a pitch, rotating the forearm about the elbow. If the velocity of the ball in the pitcher's hand is 38.0 m/s and the pitcher's forearm is 0.300 m long, what is the angular velocity of the forearm? Hint: Drawing a small cartoon could be helpful. Enter to 3 significant figures W3 rad/s 1. The propeller of a World War II fighter plane is 2.40 m in diameter. (a) What is its angular velocity in radians per second if it spins at 1150 rev/min? Enter to 3 significant figures rad/s (b) What is the linear speed of its tip at this angular velocity if the plane is stationary on the tarmac? Enter to 3 significant figures v= m/s (c) What is the centripetal acceleration of the propeller tip under these conditions? Calculate it in meters per second squared Enter to 3 significant figures ac= m/s Compare the centripetal acceleration to the acceleration due to gravity g. Is the centripetal acceleration very large or very small compared to g? Enter to 3 significant figures ac g