Sticklers #10

An unbalanced force is

• equal forces acting on one object in opposite directions

• any force that requires contact to occur.

• Forces that cause a change in the motion of an object

• a force that occurs without contact

Tags

NGSS.MS-PS2-2

Which of the following represents a balanced force?

• if you kick a football and it moves to the fifty yard line

• two tug of war teams move 3 inches to the right and 1 inch to the left

• a car speeding up for 45 mph to 55 mph

• a person sitting in a chair

a push or pull

• force

• friction

• speed

• momentum

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which would need more force to move?

• 50 g goft ball

• 100 g soft ball

• 10 g bouncy ball

• 1 g penny

Tags

NGSS.MS-PS2-2

What does it take a desk more force to move than a pencil?

• A pencil has more mass, so it will take more force to move the pencil.

• A desk has more mass, so it will take more force to move the desk.

• The desk and pencil will move the same with the same force.

• The desk was empty.

Tags

NGSS.MS-PS2-2

A material that can not be broken down into anything simpler.

• mixture

• compound

• element

• solution

a physical combination of substances that you can plainly see with the naked eye

• compound

• mixture

• solution

• element

NaCl is a ...

• element

• solution

• mixture

• compound

A green car and an orange car go around the track three times. The green car finishes first. What can be said about the green car?

• The green car has the same average speed as the orange car.

• The green car has a greater average speed than the orange car.

• The green car has a average speed less than the orange car.

• The orange car has a greater average speed than the green car.

How do you separate salt from water?

• sifting

• condensation

• evaporation

• floating

Tags

NGSS.MS-PS1-4