Force, Friction, and Gravity

Net forces are zero when

• The forces are balanced

• The forces are unbalanced

If a car is driving down the street you know there are _______ forces at work

• Balanced

• Unbalanced

Tags

NGSS.MS-PS2-2

__________ occurs when the microscopic hills and valleys stick two surfaces together

• Force

• Friction

A ball moving through the air is experiencing ________ friction

• rolling

• fluid

• sliding

• static

If you apply a force to an object where all forces are balanced, select which one is true.

• static friction if the object moves

• static friction if the object doesn't move

• sliding friction if the object is on water and moves

• rolling friction if in water

Tags

NGSS.MS-PS2-2

A hockey puck crossing ice is not (select all)

• rolling friction

• sliding

• fluid friction

• static friction

If you push a wagon with a heavy box in it

• static friction turns into sliding friction when it moves

• static friction turns into rolling friction when it moves

• static friction turns into sliding friction if it does not move.

• none of the answers are correct

Tags

NGSS.MS-PS2-2

All matter does not experience gravitational force

• True

• False

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

The force of attraction that pulls the book towards you

• friction

• gravity

• Newtons

Tags

NGSS.MS-PS2-4

Net force is zero when (draw a picture if his helps)

• 10 N. force up against 20 N force left

• 20 N force left against 20 N force up

• 25 N force North, 10 Newton force East, 25 Newton force South, 15 Newton Force West

• 25 N force North, 10 Newton force East, 25 Newton force South, 10 Newton Force West

Tags

NGSS.MS-PS2-2