Physics, 20.02.2020 17:28 nickykardashian

You stand on a frictionless platform that is rotating with an angular speed of {eq}3.9rev/s {/eq}. Your arms are outstretched, and you hold a heavyweight in each hand. The moment of inertia of you, the extended weights, and the platform is {eq}7kg/m^2 {/eq}. When you pull the weights in toward your body, the moment of inertia decreases to {eq}5.2 kg / m^2 {/eq}.
a) What is the resulting angular speed of the platform? Answer in units of {eq}rev/s {/eq}.
b) What is the change in kinetic energy of the system? Answer in units of J.

Answers: 2

Show answers

Other questions on the subject: Physics

Physics, 22.06.2019 06:30, bluevibe

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.

Answers: 2

continue

Physics, 22.06.2019 08:00, jbot9050

You have a pick-up truck that weighed 4,000 pounds when it was new. you are modifying it to increase its ground clearance. when you are finished

Answers: 1

continue

Physics, 22.06.2019 09:00, montgomeryaevans

This is really important 1.which of the following prefixes represents the largest value? (2 points)gigahectorkilomilli2.which of the following types of graphs is best for plotting the mean, median, and mode of data? (2 points)bar graphbox-and-whiskercircle graphstem-and-leaf

Answers: 1

continue

Physics, 22.06.2019 10:00, squirrel6875

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.

Answers: 1

continue

You know the right answer?

You stand on a frictionless platform that is rotating with an angular speed of {eq}3.9rev/s {/eq}. Y...