7th Homework Quiz 1

In a damped oscillation, a force acts to change the amplitude of oscillation.

Which of the following statements about the direction of this force is correct?

• The force is in the opposite direction to the displacement.

• The force is in the opposite direction to the velocity.

• The force is in the same direction as the displacement.

• The force is in the same direction as the velocity.

Which of the following is not an example of SHM?

• A simple pendulum
• A vibrating spring
• A marble on a concave surface
• Bouncing on a trampoline

The diagram shows a coin on a horizontal surface which is rotating at a constant angular velocity $\omega$  

Which arrow correctly shows the direction of the frictional force on the coin?

• A

• B

• C

• D

For a system in simple harmonic motion, which of the following is the time required to complete a cycle of motion?

• amplitude
• period
• frequency
• revolution

Which graph shows how the electric field strength E due to a negative point charge varies with distance r from the charge?

• A

• B

• C

• D

Two charges +Q and –Q are located as shown on the diagram. × is the point halfway between the two charges.

A small positive charge moves from +Q to –Q. Which statement about the resultant force on this charge, as it passes through ×, is correct?

• The magnitude of the resultant force is a maximum.

• The magnitude of the resultant force is a minimum.

• The resultant force changes direction.

• The resultant force is zero.

Which position shows the spring with maximum elastic potential energy?

• A
• B
• C
• D

At which point is the electric field the weakest?

• A because it is the furthest away
• A because the field lines are further apart
• C because the field lines are further apart
• C  because it is the furthest away

Tags

NGSS.HS-PS2-4

Which of the following is a true statement about the electric field between the two plates?

• The field is attractive between the plates and uniform in strength
• The field is repulsive between the plates and uniform in strength
• The field is attractive between the plates and strongest near the positive
• The field is repulsive between the plates and strongest near the positive

Tags

NGSS.HS-PS2-4

The unit for capacitance is the farad. The farad can also be written as

• A s V^-1

• A s^-1 V^-1

• A^-1 s^-1 V

• A^-1 s V