UCM Nov 14 2019

Bruno the bat has a mass of 0.58 kg and flies at a speed of 0.8 m/s in circle of radius 0.5 m. What is his acceleration?

• 0.25 m/s²

• 1.3 m/s²

• 1.6 m/s²

• 0.74 m/s²

Tags

NGSS.HS-PS2-1

What is the direction of the acceleration at point B, if the ball is revolving clockwise?

• up
• right
• down
• left

Tags

NGSS.HS-PS2-1

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

Tags

NGSS.HS-PS2-1

Centrifugal force is a ______

• force that pushes you to the outside of a circle during uniform circular motion.

• fictitious force that is not really a force, it's inertia.

• The force that keeps the planets in orbit

A curved groove is place on the top of a level table as shown in the diagram. A ball is pushed in the groove at P so that it leaves at Q. Which picture shows how the ball will move when it leaves the groove at Q?

• 
• 
• 
• 

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

How can you find the distance around a circle?

• 2πr

• d/t

• v²

• T

What force keeps an object moving in a circle?

• centripetal force (inward)

• centrifugal force (outward)

What is the equation for acceleration?

• v = 2πr/T

• a = v²/r

• F = mv²/r

• F = ma

Tags

NGSS.HS-PS2-1

What is the equation for centripetal force?

• v = 2πr/T

• a = v²/r

• F = mv²/r

• F = ma

In the hammer throw event, which of the following correctly indicates the path the hammer will take when it is released?

• The hammer will take a straight-line path tangent to the circle it was inscribing prior to its release.

• The hammer will continue to curve, with the circle getting larger each revolution.

• The hammer will take a straight-line path directly away from the center of the circle it was inscribing prior to its release.

• The hammer will take a straight-line path directly toward the center of the circle it was inscribing prior to its release.