Gravity and Friction 9-1

 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

The wheels on a moving skateboard most likely experience ____________.

• Rolling Friction
• Sliding Friction
• Fluid Friction
• Static Friction

These swimmers are most likely experiencing _________.

• Rolling Friction
• Sliding Friction
• Fluid Friction
• Static Friction

As the child moves down the slide, they mostly experience the effect of ___________.

• Rolling Friction
• Sliding Friction
• Fluid Friction
• Static Friction

Tags

NGSS.MS-PS2-2

As mass increases, what happens to the gravitational force?

• It increases.
• It decreases.
• It stays the same.
• It acts as a 3rd degree derivative function.

Tags

NGSS.MS-PS2-4

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

Which of the following will not change in different gravitational fields?

• weight
• force
• mass
• pounds

What is the rate at which Earth's gravity accelerates objects in free fall?

• 9.8 m/s²
• 3.14159 km/hr/s
• 13.7 m/s²
• 42 km/h/s

Tags

NGSS.MS-PS2-2

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

• similar
• opposite
• parallel
• perpendicular