friction and gravity

Friction is a force that acts in a(n) ___________ direction relative to a moving object.

• similar
• opposite
• parallel
• perpendicular

 What is the unit that measures force?

• Weight
• Net force
• Newton
• Kilogram

What type of friction acts on an object that is not yet moving?

• Static
• Dynamic
• kinetic
• Rolling

Two factors effecting the magnitude of the force of gravity between 2 objects are...

• mass and distance 
• mass and volume
• distance and weight 
• weight and mass

Tags

NGSS.MS-PS2-4

As the distance between 2 objects increases, what happens to gravitational force?

• It increases.
• It decreases.
• It stays the same.
• Only Mr. Silvio knows what will happen.

Tags

NGSS.MS-PS2-5

The force of gravity acting on an object is the object's ______.

• Mass
• Matter
• Weight 
• Terminal velocity 

Tags

NGSS.MS-PS2-4

Friction is always caused by ___ attraction between particles.

• electrical

• static

• fluid

• plumbing

You can reduce friction by

• reducing surface area

• removing lubricant

• reducing mass

• reducing speed

• two of the above

Which type of friction exists between the floor an a person walking

• static friction

• kinetic friction

• rolling friction

The explanation of why gravity exists dealing with

• attraction of masses

• attraction of weights

• curving spacetime

• was discovered by Newton

Tags

NGSS.MS-PS2-4