IB Physics Topic D SL

The Sun is 93 million miles from the Earth. If that distance was four times its current value, what would happen to the force of gravity the Sun exerts on the Earth?

• It would be 4 times its current value

• It would be 1/4th its current value

• It would be 1/8th its current value

• It would be 1/16th its current value

• It would be 2 times its current value

The definition of gravitational field strength is:

• The region of space surrounding a body where other bodies will feel an attractive force due to it.
• The region of space surrounding a body where other bodies will feel an repulsive force due to it.
• The region of space surrounding a charge where other charges will feel an attractive force due to it.
• The region of space surrounding a charge where other charges will feel an repulsive force due to it.

Which image below best represents the forces acting on the Earth due to the Sun's gravitational field?

• 
• 
• 

What is the acceleration due to free fall when the distance is twice the radius of the Earth?

• 4g

• g

• g/4

• g/2

Two objects are attracted to each other with 36 N of gravitational force.
What would the force between them be if one of the masses were doubled?

• 9
• 18
• 72
• 144

A positive charge is moving to the left through a magnetic field that is going into the page. What is the direction of the force on the charge?

• Up

• Down

• Into the page

• Out of the page

• No Force

In the diagram below, P is a point near a negatively charged sphere. Which direction best represents the direction of the electric field at point P?

• Right
• Left
• Up 
• Down

At which point is the electric field the strongest

• A
• B
• C
• D

Consider the electric field lines shown in the diagram below. From the diagram, it is apparent that object A is ____ and object B is ____.

• +,+
• +,-
• -,+
• -,-

Based on the arrangement of the electric field lines in the diagram, what are the charges?

• both charges are the same

• the charges are opposite

• they are neutral; no charge