Newton's Laws

Question 1

What is mass?

Answer 1

• A physical property of an object which describes how much matter it contains.
• A measure of inertia
• Resists change in motion (acceleration)

Question 2

What is inertia?

Answer 2

The tendency of an object to resist a change in motion.

Question 3

Define net force.

Answer 3

• The vector sum of all of the forces acting on an object.
• ∑F which causes mass to accelerate

Question 4

What does a net force cause?

Answer 4

Acceleration in the same direction of the force.

Question 5

What is weight?

Answer 5

The gravitational force acting on an object.

Question 6

Solve for m

F_g = mg

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Answer 6

m = F_g/g

Question 7

What is an object’s center of mass?

Answer 7

A point in an object through which its entire weight can be thought to act.

Question 8

What is each force represented by in a free body diagram?

Answer 8

A labelled arrow, proportional to the size of the force.

Question 9

What does “∑” mean in the following equation?

∑F = ma

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Answer 9

• Vector sum
• Add up all of the …
• Combine one dimension
• Net

Question 10

What is friction?

Answer 10

The force that arises when two surfaces rub against each other.

Question 11

What is this?

F_f

answer with as many connections as possible

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Answer 11

• Force of Friction
• = μF_N

Question 12

What is this?

F_g

answer with as many connections as possible

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Answer 12

• Force of gravity
• Weight
• = mass*9.8
• =mg

Question 13

Solve for μ

F_f = μF_N

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Answer 13

μ = F_f / F_N

Question 14

What is this?

μ_s

answer with as many connections as possible

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Answer 14

• mu
• coefficient of static friction
• describes the interaction of two surfaces while stationary
• increases from zero to max in response to a force until broken when the object starts to slide

Question 15

What is this?

μ_k

answer with as many connections as possible

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Answer 15

• mu
• coefficient of kinetic friction
• describes the interaction of two surfaces while sliding

Question 16

True or False

“F_g” means F * g

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Answer 16

False

In F_g, the g is a subscript, which serves as a description

Question 17

What is drag?

Answer 17

• The resistive force acting on an object that is travelling through a fluid.
• e.g. F_air

Question 18

Define terminal velocity.

Answer 18

• When an object stops accelerating and has a constant velocity because the drag is equal and opposite to its weight.

Question 19

What is tension?

Answer 19

• The force within a stretched cable or rope.
• e.g. F_T or just T

Question 20

What is this?

F_N

Answer 20

• Normal force
• Responsive force of a surface pushing back on an object
• Perpendicular to surface

Question 21

What do all objects with a mass exert?

Answer 21

A gravitational pull on other massive objects around them.

Question 22

What is gravitational field strength?

Answer 22

The acceleration that an object experiences due to gravity.

Question 23

What is the gravitational field strength close to the surface of the earth?

Answer 23

(G * M_Earth) / r_Earth² = 9.81m/s/s

Question 24

What does the following phrase mean?

constant velocity

Answer 24

• acceleration = 0 m/s/s
• forces are balanced
• ∑F = 0

Question 25

What would you label this force?

• Normal force
• Responsive force of a surface pushing back on an object
• Perpendicular to surface

Answer 25

What is this?

F_N

Question 26

• The force within a stretched cable or rope.
• e.g. F_T or just T

Answer 26

What is tension?

Question 27

• Force of gravity
• Weight
• = mass*9.8
• =mg

Answer 27

What is this?

F_g

answer with as many connections as possible

Created by Colletti

Question 28

What is the symbol for the following?

coefficient of static friction

Answer 28

What is this?

μ_s

answer with as many connections as possible

Created by Colletti