Motion of a Pendulum & Spring

Which is true about the restoring force?

• A force that restores motion.

• A force that is inversely proportional to displacement.

• A force that always pulls a mass back to equilibrium.

• A force that pushes a mass towards maximum amplitude.

What part of the weight does the restoring force come from in a pendulum?

• X component (or tangential)

• Y component (or opposite tension)

• Both the X & Y components.

Tags

NGSS.HS-PS2-1

Which position is restoring force = zero?

• A

• B

• C

• A & C

Tags

NGSS.HS-PS2-1

Which position has zero acceleration?

• A

• B

• C

• A & C

Tags

NGSS.HS-PS2-1

Which position has zero velocity?

• A

• B

• C

• A & C

A pendulum is released from 40 degrees from its resting position. Is its motion true simple harmonic motion?

• Yes

• No

Which force of gravity is opposite the tension force in a pendulum?

• Fg (total weight)

• Fgy (y component of weight)

• Fgx (x component of weight)

How does the tension force change as a pendulum falls from max amplitude towards equilibrium?

• it stays constant

• decreases

• increases

Tags

NGSS.HS-PS2-1

Which statement is true about Fgx as a pendulum’s bob is falling towards equilibrium?

• Fgx is a constant value because weight doesn’t change.

• Fgx decreases due to an increase in Fgy

• Fgx increases due to a decrease in Fgy

Tags

NGSS.HS-PS2-1

Assume this spring is in simple harmonic motion.

Which position is equilibrium?

• 1

• 2

• 3