Ch 5- Circular Motion

Question 1

Centripital force

Answer 1

Center seeking force
Must be included with centripital accel
Net force

Question 2

Periodic motion/ period

Answer 2

Repeated motion
Period- seconds/cycle
Frequency- cycles/second (Hz)
Rpm-Hz (divide by 60)

Question 3

Horizontal circle problems

Answer 3

Fn=Fg
Fn-Ff=muSFn
Fg-mg

Question 4

Vertical circular problems

Answer 4

Top of circle: Fc=Fn(Ft) + Fg
Bottom of circle: Fc=Fn(Ft) + Fg
Min speed?

Question 5

Instantaneous velocity in circular motion

Answer 5

The velocity of an object moving in a circle is the tangent line at that point
Same speed, different velocity (direction changing constantly)
When drawing vectors, change in velocity (centripital accel) always points to center of circle (resultant)