3.1 - Forces(21pts.)

Which best demonstrates friction?

• 
• 
• 
• 

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HS-PS2-1

Forces that cancel each other are called ​ (a)   forces.

• balanced

• inactive

• neutral

• null

• unbalanced

Answer explanation

Balanced forces cancel each other out, resulting in no net force. This concept is crucial in understanding the equilibrium of objects.

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HS-PS2-2

Organize these options based on the description of the measured variable.

Groups:

(a) Weight

,

(b) Mass

,

(c) Gravity

• 
• Is a measurement of the amount of matter, in an object.

• 
• Has units of Newtons (N) or Pounds (lbs.)

• 
• On Earth, this constant is 9.8 m/s².

• 
• Has units of Grams (g) and Kilograms. (kg)

• Can be explained using the concept of a field.

• Is the product of mass and gravitational strength

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HS-PS2-4

HS-PS2-1

On Earth, what is the weight of a large-screen TV that has a mass of 75 kg?

[Round answer to nearest WHOLE number in Newtons]

Mathematical Equivalence

ON

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HS-PS2-2

Suppose you are standing on a scale in an elevator that is accelerating upward.

Will the scale read your weight as larger or smaller than the weight it reads when you are stationary?

Explain.

• Larger, the force that the scale exerts on you is greater than your weight; the reading would increase.

• Larger, The force that the scale exerts on you is less than your weight; the reading would decrease.

• Smaller, The force that the scale exerts on you is less than your weight; the reading would increase.

• Smaller, The force that the scale exerts on you is greater than your weight; the reading would decrease.

Answer explanation

Larger, the force that the scale exerts on you is greater than your weight; the reading would increase.

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HS-PS2-1

How does the gravitational force change as two objects move farther apart?

• Gravitational strength increases.

• Gravitational strength decreases.

• Gravitational strength does not change.

• Gravitational strength balances with weight.

Answer explanation

Gravitational force decreases as two objects move farther apart due to the inverse square law, which states that the force is inversely proportional to the square of the distance between the objects.

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HS-PS2-2

Use the following terms to complete the concept map on forces:

b

a

c

d

e

Air Resistance

Mass

Distance

Friction

Speed

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HS-PS2-1