Forces and Equilibrium

To test a scientific hypothesis you would...

• set up one experiment and look at the results.

• set up many experiments and look at the results.

• use the results of only the experiments that confirm the hypothesis.

• find the best result and report only that result.

Tags

NGSS.HS-PS1-2

The combination of all forces acting on an object is called __________

• Parallelogram Rule
• Net Force
• Vector Quantity
• All the Jedi's using their abilities together

Tags

NGSS.HS-PS2-1

True or False: A scalar quantity has both magnitude and direction, whereas a vector quantity is described by only its direction.

• True

• False

Suzie holds an apple at rest in her outstretched hand. The force she applies in holding it still...

• equals the weight of the apple.

• is slightly more than the weight of the apple.

• is slightly less than the weight of the apple.

• is zero, until she drops the apple.

Tags

NGSS.HS-PS2-1

The equilibrium rule, ∑F = 0, applies to...

• objects or systems at rest.

• objects or systems in uniform motion in a straight line.

• neither (a) nor (b)

• both (a) and (b)

When you stand on two bathroom scales, one foot on each scale with weight evenly distributed, each scale will read...

• actually more than your weight.

• your weight.

• half your weight.

• zero.

Burl and Paul have combined weights of 1300 N. The tensions in the supporting ropes that support the scaffold they stand on adds to 1700 N. What is the weight of the scaffold itself?

• 400 N

• 1300 N

• 1700 N

• 3000 N

What is a force? 

• combination of all forces acting on an object
• is a push or a full
• when life is stable
• is an arrow that represents the magnitude and direction of a quantity

Tags

NGSS.HS-PS2-1

Equilibrium means _________

• being at rest
• traveling at light speed
• balance
• pushing or pulling

Is known as a "stretching force"

• force

• vector

• tension

• scalar