A push or a pull that can move an object is a __________.

• gear

• lever

• force

• machine

Tags

NGSS.MS-PS2-2

The force that opposes the motion of two surfaces sliding past each other is called ___________.

• acceleration

• inertia

• friction

• unbalanced

What famous scientist was the unit of force named after?

• Isaac Newton

• Galileo Galilei

• Albert Einstein

• Charles Darwin

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

The force of gravity is responsible for which of these things?

• Keeping our planet in orbit around the sun.

• Keeping our moon in orbit around our planet.

• Letting things fall to the ground.

• All of the above.

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

A student wants to determine the amount of force needed to move a 100 gram block across 4 surfaces: a rug, glass, grass and concrete. Choose the best answer for Part A and Part B.

Tags

NGSS.MS-PS2-2

A force that opposes the motion of an object is called (a)   .

• friction

• gravity

• heat

Answer explanation

A force that opposes the motion of an object is called friction. It acts in the opposite direction to the movement, slowing down or stopping the object. Gravity pulls objects down, while heat is not a force.

Tags

NGSS.3-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.

b

Speed decreases

Speed increases

Speed remains constant

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.

c

Speed remains constant

Speed increases

Speed decreases

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A student is investigating the number of times 4 different balls bounce when dropped on the gym floor. The data table is shown. Choose the correct classification for each variable as independent, dependent, or constant.

Drop height - ​ (a)  

Ball - ​ (b)  

Surface - ​ (c)  

Bounces - ​ (d)  

• constant

• independent

• dependent

Match the following

• A push or pull required to

  move an object

• Weight

• An opposing force against objects moving through the air

• Force

• A measure of the gravitational force between objects

• Mass

• The force that attracts

  two objects with mass

  toward each other.

• Air Resistance

• The amount of matter contained in an object or substance

• Gravity

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4