Circular Velocity

The velocity is always _____ to the line of a circle. 

• outwards
• towards the center
• tangent
• faster

Centripetal acceleration always points

• in the direction of the object's motion
• in the opposite direction of the object's motion
• towards the center of the circle
• towards the outside of the circle

Andromeda is a spiral galaxy, what is responsible for its spin?

• F_A
• F_T
• F_G
• f_s

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

Assuming Andromeda rotates at a uniform rate, which stars are moving the fastest?

• Stars closest to center
• Stars furthest from the center
• Stars with the hottest temperature
• Stars with the coldest temperature

Tags

NGSS.HS-ESS1-4

The units of tangential (linear) velocity are

• m s^-1
• rad s^-1

Centripetal force is...

• the resultant force acting on a body moving at constant speed in a circle 
• the outwards force acting on a body moving at constant speed in a circle 

Centripetal acceleration acts towards the ___________ of the circular motion

• centre
• circumference

Bruno the bat flies at a speed of 0.5 m/s in circle of radius 1 m. What is his acceleration?

• 0.25 ms^-2
• 0.5 ms^-2
• 1 ms^-2
• 2 ms^-2

Tags

NGSS.HS-PS2-1

A horse gallops around a circular arena.  The centripetal force on the horse is ___.

• directed outward
• tension
• directed toward the center of the arena
• 9.8 N

Which represents the acceleration of the ball?

• A
• B
• C
• D

Tags

NGSS.HS-PS2-1