Circular Motion

Question 1

Why does the speed remain constant when swinging a bung

Answer 1

Resultant F = 90 degrees to motion ∴ no Work is done

Question 2

Describe the bung experiment -.-

Answer 2

• rotate bung at constant radius / try keep reference mark at end of tube
• F = Mg
• Measure t for 20 rev ∴ find T
• “ r when stationary
• v = eqt

Question 3

When do you feel weightless

Answer 3

At top of the circle

when W= the required centripetal F