Topic 10: Forces and Motion – Lessons 1 and 2

Why is a reference point important when describing motion?

• It shows how far an object has traveled

• It's the starting point for measuring speed

• It measures the acceleration of an object

• It allows you to determine if an object has changed position

What is the formula for speed?

• Force x Distance

• Distance/Time

• Distance x Time

• Time/Distance

Tags

NGSS.MS-PS3-1

A car travels 60 km in 2 hours. What is the car's average speed?

• 20 km/h

• 60 km/h

• 30 km/h

• 120 km/h

A car travels at a constant speed of 25 m/s for 40 seconds. How far does the car travel?

• 65 m

• 1,000 m

• 100 m

• 400 m

On this distance-time graph, a straight horizontal line is shown. What does this line tell you about the object's motion?

• The object is moving at a constant speed

• The object is speeding up

• The object is slowing down

• The object has stopped moving

True or False? Gravity and friction are both examples of forces.

• True

• False

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

If a 15 N force pushes an object to the right and a 10 N force pushes it to the left, what is the net force?

• 5 N to the left

• 25 N to the right

• 5 N to the right

• 0 N

Tags

NGSS.MS-PS2-2

Which statement is true about balances forces?

• They are equal in size and opposite in direction, resulting in no motion change

• They cause an object to speed up

• They change the direction of motion

• They always make objects move faster

Convert 5 kilometers to meters.

• 50 m

• 500 m

• 5,000 m

• 50,000 m

Convert 250 centimeters to meters.

• 2500 m

• 25 m

• 2.5 m

• 0.25 m