Forces

The forces of gravity and magnetism are different from the force of friction because–  

• gravity and magnetism pull objects down while friction pushes objects up. 

• gravity and magnetism push on objects while friction pulls on objects. 

• 
  gravity and magnetism attract objects while friction repels objects. 

• gravity and magnetism can act on an object at a distance while friction only acts when substances come in contact with each other. 

Tags

NGSS.MS-PS2-5

Felicia wants to try out her new roller skates. She wants to see how fast she can skate on them. To do this, she must look for a surface to skate on that has the–  

• most friction. 

• 
  least friction. 

• most gravity. 

• least gravity. 

• Pulls objects toward Earth 

• Always a pulling force 

• gravity

• friction

• magnetism

Tags

NGSS.MS-PS2-4

• Created when two objects rub together 

• Always a pushing force 

• gravity

• friction

• magnetism

• Only acts on objects that are made of certain materials 

• Can be a pushing or pulling force 

• gravity

• friction

• magnetism

Tags

NGSS.MS-PS2-5

NGSS.MS-PS2-3

When conducting an investigation to explore patterns of gravity acting on different objects, which of the following would be the best procedure?  

• Putting objects of the same mass at different distances away from each other and seeing how gravity affects them 

• Rolling objects of the same mass on different types of surfaces and timing how long it takes for them to travel a certain distance 

• Holding objects of different masses at the same height above the floor and letting them drop, timing how long it takes for them to fall to the floor 

• Placing a magnet next to objects that are made of different materials and measuring how high the magnet can lift each object 

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A group of students designed an investigation in science class. They roll the same marble down a ramp and measure the distance it continues to roll past the bottom of the ramp. In the first set of trials, the ramp is covered in felt. In the second set of trials, it is covered in aluminum foil, and in the third set of trials, it is covered in bubble wrap. What is this group trying to explore? 

• 
  How different amounts of gravity affect how far the marble rolls

• How different amounts of friction affect how far the marble rolls 

• 
  How magnetism affects how far the marble rolls 

• 
  How different strengths of pushing force affect how far the marble rolls 

Tags

NGSS.MS-PS2-2

A push or pull that causes an object to move, stop, or change direction

• force

• friction

• magnetism

• distance

• pattern

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

The pushing or pulling force produced by a magnet

• force

• friction

• magnetism

• pattern

• distance

A force that resists the motion of two surfaces sliding across one another

• force

• friction

• magnetism

• pattern

• distance