Review of Force and Motion LC2

Review of Force and Motion LC2

Balanced and Unbalanced Forces

Net Force

Mass, Force and Acceleration

Open Ended

Which topic(s) are giving you the most difficulty?

Please explain

Forces

Net Force

F=ma

Variables

Multiple Choice

In the previous experiment, if the same tennis ball is used each time each

time it is a

• Controlled Variable

• Independent Variable

Multiple Choice

In the same investigation the height of the ramp is changed on purpose to change the acceleration of the ball. The height of the ramp is the

• controlled variable

  (what stays the same)

• independent variable

  (what is changed on purpose)

Multiple Choice

Calculate the net force on the truck

100 N pulling down

100 N pulling up

900 N pulling right

700N pulling left

• 200 N right

• 0 N

• 1200 N right

Multiple Choice

- Net force = 0N

- Opposite and equal forces

- No change in motion

• Balanced Forces

• Unbalanced Forces

Multiple Choice

Why is the grass easier to push?

• It has less mass and needs less force

• It has more mass and needs less force

• It is on a hill

Baseball 120 g, Billiard Ball 170 g, Tennis ball 60 g

Poll

Which ball will travel the farthest down a ramp?

• Billiard Ball (most mass)

• Baseball (middle)

• Tennis ball (least mass)

Multiple Choice

What is an independent variable?

• Things you keep the same - they do not change

• What you observe or measure

• What you change on purpose

Multiple Choice

What is a dependent variable?

• Things you keep the same - they do not change

• What you observe or measure

• What you decide to change in an experiment

Multiple Choice

In an investigation, how does the amount of water affect how tall a plant grows.

The amount of water we give the flowers would be the

• independent variable

• dependent variable

• controlled variable

Multiple Choice

The height of the plant we measure is the

• independent variable

• dependent variable

• controlled variable

Open Ended

What is something we want to keep the same (control) throughout the plant experiment?