What is a Force?

• The distance

• Mass

• A push or pull

• Give me a  failing grade 

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The unit of force is

• m/s

• m/s^2

• newton

• kg

An _______ force must act on an object for it to CHANGE it's motion

• balanced

• unbalanced

• gravitational

• electrical

Tags

NGSS.MS-PS2-2

If the net force is equal to zero, the forces acting on the object are

• balanced

• unbalanced

Tags

NGSS.HS-PS2-1

A box is moving toward the right. Two forces act on the box: a force pushing the box to the right and a friction force. The two forces acting on the box are shown in the four force diagrams. Identify whether the speed of the box in each diagram will decrease, increase or remain constant.

c

Speed increases

Speed decreases

Speed remains constant

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The graph below shows an object’s position in meters (m) over time in seconds (s) as it travels in a straight line. The object starts at rest.

Identify whether there are balanced or unbalanced forces acting on the object during each time interval. 

Between 1-2 seconds ​ (a)  

Between 3-4 seconds ​ (b)  

Between 5-7 seconds ​ (c)  

• Balanced Forces

• Unbalanced Forces

Answer explanation

Remember, if the line is curved, the forces are unbalanced!

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A box is moving toward the right. Two forces act on the box: a force pushing the box to the right and a friction force. The two forces acting on the box are shown in the four force diagrams. Identify whether the speed of the box in each diagram will decrease, increase or remain constant.

b

Speed increases

Speed remains constant

Speed decreases

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

When soccer legend Megan Rapinoe kicks the ball,

her ​ (a)   pushes the object right, but ​ (b)   pushes the object left.

• applied force

• friction

• gravity

• normal force

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Match the following

• A measure of the gravitational force between objects

• Force

• An opposing force against objects moving through the air

• Air Resistance

• A push or pull required to

  move an object

• Gravity

• The amount of matter contained in an object or substance

• Mass

• The force that attracts

  two objects with mass

  toward each other.

• Weight

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

This is the free-body diagram of a box. Someone is trying to push the box, but it is too heavy. Which arrow represents gravity?

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS2-4