Contact Forces Unit 1

What is a force?

• The amount of electric charge an object has
• A measure of an object's energy.
• A push or a pull
• How much energy it takes to move something.

What is force measured in?

• Kilograms
• Meters per second
• Joules
• Newtons

Which of these is an example of a force you may have exerted today?

• Opening a door.
• Sitting in your chair.
• Holding a pencil.
• All are examples of forces.

What type of force slows a baseball rolling on a field?

• Friction
• Tension
• Elastic
• Magnetic

An object that has MORE inertia is. . .

• Easier to Start moving AND to stop from moving.
• Harder to Start moving AND to stop from moving

A ____________ is a push or a pull on an object.

• chemical
• force
• magnet
• gravity

A baseball bat hits a baseball with a force of 100 Newtons. What is the force and its direction exerted by the ball on the bat?

• 100 Newtons, same direction

• 100 Newtons, opposite direction

• 200 Newtons, same direction

• 200 Newtons, opposite direction

Tags

NGSS.MS-PS2-1

Students are using an air rocket.

Students pump air into the rocket, then release the rocket. In order to vary the amount of force acting on the rocket, which of the following should the students change in each trial?

• The length of the hose attached to the pump

• The distance traveled by the rocket

• The amount of air pumped into the rocket

• The height of the rocket from fins to cone

Tags

NGSS.MS-ETS1-4

NGSS.MS-PS2-2

The tendency to resist a change in motion

• Net Force
• Gravity
• Inertia
• Balanced Forces

The three laws of motion were written by ____

• Newton
• Einstein

Tags

NGSS.MS-PS2-1