Forces and Motion

What is the unit used for force?

• kilogram

• Newton

• meters

• Joule

When an object continues to move in the same direction at the same speed, we consider to the object to have:

• balanced forces

• unbalanced forces

When an object changes it motion and starts to accelerate, we consider to the object to have:

• balanced forces

• unbalanced forces

What is the net force acting on the object?

• 20 N Right

• 40 N Right

• 20 N Left

• 40 N Left

The forces acting on the box are ​ ​ (a)   . The Net Force is ​ (b)   . The box will ​ (c)   ​ .

• balanced
• 0 Newtons
• not move
• move left
• move right
• 70 Newtons
• unbalanced

A girl is pushing a cart by herself with a force of 7 N. What will happen if a boy begins to help her and their combined force is 17 N?

• The cart will speed up.
• The cart will slow down.
• The cart will move at a constant speed in a straight line.
• The cart will fly to never never land!

The formula for Speed is...

• Speed = distance/ time

• Speed = time/ distance

A runner races in the 100 meter dash. It takes her 10 seconds to finish. What is her average speed?

• 10 m/s

• 1000 m/s

• 100 seconds

• 10 seconds

Speed -

• A measure that gives rate of change and position

• A measure that dissolves to one unit

• A measure of distance an object travels per unit of time.

• A measure of distance an object travels per unit of measurement.

Avery likes to walk 30 feet in 10 seconds. What is her speed?

• 3 feet/sec
• 6 feet/sec
• 10 feet/sec
• 2 feet/sec