Forces Lesson 2

By Angela Toh

Forces Lesson 2

Multiple Choice

 What is the unit called that measures force?

• weight
• meter
• Newton
• kilogram

Multiple Choice

The sum of all forces acting on an object and direction

• Contact Force
• Balanced Force
• Unbalanced Force
• Net Force

Multiple Choice

The push or pull between two objects

• attract

• mass

• force

• gravitational force

Multiple Choice

Are forces balanced or unbalanced when a car is moving at a constant speed in a straight line?

• Balanced
• Unbalanced

Multiple Choice

Are forces balanced or unbalanced when a marble speeds up rolling down a ramp?

• Balanced
• Unbalanced

Multiple Choice

Friction is a force that acts in an ___________ direction of movement.

• similar
• opposite
• parallel
• west

Multiple Choice

What is friction?

• the movement of objects over time

• the speeding up of motion when an object slides on a slippery floor

• the resistance of motion when one objects moves in the opposite direction of another

Multiple Choice

What direction does friction act relative to motion?

• in the same direction
• in the opposite direction 
• need more information
• depends on the force

Multiple Choice

Which of the following is an example of friction that is helpful?

• Brakes used on a bike
• Tires from a car on the road
• Tread on the bottom of your shoes
• All are examples that are helpful

Multiple Choice

How can friction be reduced?

• reduce the force acting between the 2 surfaces
• reduce the roughness of the 2 surfaces coming in contact
• use wax, grease or oil
• all of the above are ways of reducing friction

Multiple Choice

Which of the following is an example of friction that is harmful?

• Pencil marking on paper
• Engine parts wearing out
• sand placed on ice in the winter
• Using an eraser to erase marks

Multiple Choice

What are the units on the force due to friction?

• none
• Newtons
• meters
• kilograms

Multiple Choice

What is Gravity?

• A force that makes us float

• An invisible force that keeps us on the ground

• An invisible force that rocks us

Multiple Choice

The gravitational force exerted by an object depends on its

• volume

• mass

• weight

Multiple Choice

Any object with mass has gravity.

• True
• Sometimes
• False
• Never

Multiple Choice

The force of gravity acting on an object is the object's ______.

• mass
• matter
• weight 
• friction 

Multiple Choice

The force of gravity (mass x gravity) is also known as...

• mass

• weight

• distance

• acceleration

Multiple Choice

The gravitational force exerted by an object depends on its

• volume

• mass

• weight

Multiple Choice

Gravity on Mar's surface is much lower than it is here on Earth. This is because the mass is __________than Earth.

• less
• more
• the same 

Multiple Choice

What is gravitational pull?

• It makes objects at rest start moving.

• It makes objects that are moving stop.

• It makes objects fall freely.

• It pulls you into space.

Multiple Choice

The force of gravity (mass x gravity) is also known as...

• mass

• weight

• distance

• acceleration

Multiple Choice

The amount of matter in an object

• Weight

• Mass

• Volume

• Circumference

Multiple Choice

The one that stays the same no matter where you are.

• Bass

• Weight

• Mass

• Weather

Multiple Choice

The one that is affected by gravity.

• Volume

• Mass

• Weight

• Ego

Multiple Choice

The unit that goes with weight.

• Kilogram

• Newton

• Milliliter

• Mile

Multiple Choice

Mass is measured with a

• Flask

• Ruler

• Electronic Balance

• Scale

Multiple Choice

The amount of force exerted by the gravitational force on an object is:

• Volume

• Mass

• Vector

• Weight