Circular Motion and Gravitation

A bicycle has a period of 0.3s . What is the

the angular speed of its tires if their radius is 30 cm?

• 6 m/s

• 3 m/s

• 60 m/s

• 30 m/s

Since this object is accelerating, Newton's 2nd law says there must be a(n) _________

• gravity

• Equal and opposite force

• Force

• unbalanced force

Tags

NGSS.HS-PS2-1

Centripetal acceleration is the acceleration…

• Away from the center of the circle

• When an object is going straight

• Toward the center of a circle

• That doesn’t exist

What force keeps planets in orbit around the Sun?

• Friction

• Gravity

• Momentum

• Velocity

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

A particle P is moving in a circle with uniform speed. Which one of the following diagrams correctly shows the direction of the acceleration a and velocity v of the particle at one instant of time?

• A

• B

• C

• D

A pilot experiences centripetal acceleration of 2g's while maneuvering a loop at a speed of 400 m/s.  What is the radius of the loop?

• 203 m

• 8163 m

• 80,003 m

• 23 m

Tags

NGSS.HS-PS2-1

Which of the following is the unit for centripetal force?

• J

• m/s²

• kg⋅m/s

• N

A 50 g model airplane travels in a circle with a radius of 100m, the plane's velocity while moving is 50m/s, at a frequency of 5 spins per 9 seconds, What is the proper equation to use to solve for the Centripetal force?

• Fc = mv² / r

• Fc = 4π²mr / T²

• Fc = 4π²mrf²

• Fc = ma

Tags

NGSS.HS-PS2-1

How does the speed in Case A compare to the speed in Case B?

• two times

• one fourth times

• four times

• one half times

Calculate the velocity of an object moved around a circle with a radius of 1.65 m and an acceleration of 3.5 m/s².

• 2.4 m/s

• 3.6 m/s

• 3.9 m/s

• 4.2 m/s

Tags

NGSS.HS-PS2-1