8th Grade Science SLO Review

Knowing an object's position requires which of the following?

• speed

• time

• displacement

• reference point

Two people are pulling on a chain in opposite directions with forces of 500 N and 600 N. The forces would best be described as what?

• balanced forces

• unbalanced forces

• action-reaction forces

• gravitational forces

What is the motion of a crate if you push with a force of 10 N to the right, and your friend pushes on the crate with a force of 25 N to the left?

• no motion

• 15 N left

• 15 N right

• 35 N right

If a test booklet is sitting at rest on a desk, describe the force of the booklet on the desk and the desk on the booklet.

• both exert the same force on each other

• test booklet exerts more force on the desk

• the desk exerts more force on the test booklet

• neither exert any force on each other

When two objects interact through the gravitational force between them, the more massive one has a lower what than the less massive object?

• speed

• mass

• acceleration

• gravitational pull

Which direction is the acceleration of an object if a net force is acting on it?

• opposite the force

• to the left

• to the right

• direction of the force

What are the factors gravitational force depends on?

• mass and speed

• mass and distance

• distance and speed

• position and motion

What type of force is gravitational force?

• contact

• noncontact

If a swimmer can swim 40 meters in 80 seconds, how fast is she swimming?

• 2 m/s

• 40 m/s

• 0.5 m/s

• 3200 m/s

If a student walks 20 meters north, 10 meters south, and 3 meters north, what would they have to walk to have a displacement of 0 meters?

• 20 meters north

• 3 meters south

• 13 meters north

• 13 meters south