First Name

Last Name

Class period:

• 1
• 2
• 3
• 4
• 5

The amount of inertia an object has depends on its _____.

• force
• mass
• friction
• age

_____ is the force that opposes the sliding motion of two surfaces that are touching each other.

• friction
• inertia
• gravity
• spring

A group of students are playing tug-of-war. The students on both sides pull with equal force. This is an example of:

• unbalanced forces
• balanced forces
• acceleration
• displacement

The sum of all the forces acting on an object is called the _____ force.

• net
• gravitational
• final
• inertial

If the same force is applied to each of these balls, which one will have the SMALLEST acceleration?

• a
• b
• c
• d

Which of the following is NOT an example of unbalanced forces acting on an object?

• An acorn falling from a tree, accelerating
• A car moving straight at 80 km/h
• A car changing speed from 50 km/h to 80 km/h
• A truck slowing down as it approaches a stop sign

A person in a head-on car collision, who is not wearing a seatbelt, continues to move forward at the original speed of the car because of ____________.

• friction
• inertia
• gravity
• weight