Objective 2 Review

Category 2 Review (8.6A)

Unbalanced Forces

Unbalanced Forces Facts

• Balanced = not moving or moving at a constant speed

• Unbalanced = moving

• Unit for Force = Newton (N)

• Net Force= total force used on an object

• If arrows going same direction [add]

• If arrows going in opposite direction [subtract]

• Net Force if unbalanced, always goes in the direction of the greater force

Multiple Choice

1. What is the unit for force?

• Joules (J)

• seconds (s)

• Newtons (N)

• meters (m)

Multiple Select

2. Which could be examples of an unbalanced force? [check all that apply]

• A car accelerating from a stop sign

• An asteroid moving at a constant speed through space

• A box of dishes falling from a counter

• A rocket taking off

Multiple Select

3. Which could be examples of a balanced force? [check all that apply]

• A plate sitting on a dining table

• Earth orbiting the Sun

• A ball at the top of a hill that is not moving

• A baseball that has been thrown to home plate.

Multiple Select

Calculate the Net Force.

• 40 N, Left

• 40 N, Right

• 0 N, Balanced

• 75 N, Right