Time remaining:
physical science 9th

Science
Tutor: None Selected Time limit: 1 Day

This problem involves rotational kinetic energy and linear kinetic energy (equation 2). A pitching machine has a moment of inertia of 9 and a angular velocity of 30 (w1). It accelerates a baseball from 0 m/s (V1) to 30 m/s (V2). If the baseball has a mass of .1 kg what is the angular velocity of the fly wheel (w2)?

Apr 19th, 2015

Rotational kinetic energy of pitching machine= 1/2 I w1^2=1/2*9*30*30=4050 J

Kinetic energy of baseball =1/2mv2^2=1/2*0.1*30*30=45 J   ( if mass is 0.1kg)

so remaining   energy= 4050-45=4005 J

therefore,

4005=1/2*9*w^2

(4005*2)/9=w^2

w2=29.83  is the final angular velocity


Apr 19th, 2015

Studypool's Notebank makes it easy to buy and sell old notes, study guides, reviews, etc.
Click to visit
The Notebank
...
Apr 19th, 2015
...
Apr 19th, 2015
Dec 6th, 2016
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer