Physics Unit 9 SHM Review

A mass attached to a spring oscillates back and forth as indicated in the position vs. time plot. At point P the mass has

• positive velocity and positive acceleration
• positive velocity and negative acceleration
• negative velocity and positive acceleration
• negative velocity and negative acceleration

A mass suspended from a spring is oscillating up and down as indicated. Consider two possibilities:
(i) at some point during the oscillation the mass has zero velocity but is accelerating (positively or negatively);
(ii) at some point during the oscillation the mass has zero velocity and zero acceleration

• Both occur sometime during the oscillation.
• Neither occurs during the oscillation.
• Only (i) occurs.
• Only (ii) occurs.

An object hangs on a spring and bounces up and down. The potential energy is graphed below. Consider point O. The position at this point must be

• either an upper or lower extreme: there's no way to tell.
• an upper extreme.
• a lower extreme.
• a midpoint.

A single person swings on a swing without pumping, so the swing oscillates back and forth at its natural frequency. If, instead, two people sit on the swing, the natural frequency of the swing is

• greater.
• the same.
• smaller.

A person swings on a swing without pumping, so the swing oscillates back and forth at its natural frequency. If, instead the person stands on the swing (again, no pumping), the natural frequency of the swing is

• greater.
• the same.
• smaller.

A string is clamped at both ends and plucked so it vibrates in a standing mode as shown below. How many nodes and antinodes are there?

• 2 nodes, 3 antinodes
• 3 nodes, 2 antinodes
• 4 nodes, 3 antinodes
• 3 nodes, 4 antinodes

Tags

NGSS.HS-PS4-1

A string is clamped at both ends and plucked so it vibrates in a standing mode between two extreme positions a and b. Let upward motion correspond to positive velocities. When the string is in position c, the instantaneous velocity of points along the string:

• is zero everywhere.
• is positive everywhere.
• is negative everywhere.
• depends on location on the string.

At what point will the pendulum bob have maximum positive velocity? (Let right be positive and left be negative.)

• Point A
• Point B
• Point C
• Point D

At what point will the pendulum bob have maximum positive acceleration? (Let right be positive and left be negative.)

• Point A
• Point B
• Point C
• Point D

Below is a graph of the x-position as a function of time. Which point (ABCD) corresponds to the X on the graph? (Let right be positive and left be negative.)

• Point A
• Point B
• Point C
• Point D