Unit 2 - Forces

Question 1

Force

Answer 1

• Push/pull from interaction w/another obj
• Causes acceleration, deceleration, stationary

Question 2

Gravitational force

Answer 2

• Weakest
• Has infinite range
• Always pulls
• Acts btwn us & obj

Question 3

Newton’s Laws of Motion

Answer 3

1. Obj keeps constant v unless acted by other F
2. Fnet = ma
3. Every F on obj has opp force = in magnitude

Question 4

Law of Inertia

Answer 4

• Inertia is property of matter causing obj to resist change like motion

Question 5

Equilibrium & Static

Answer 5

• obj not a
• Obj at rest, not a

Question 6

Law of Acceleration

Answer 6

• Mass is amount of intertia, scalar (weight not property)
• a is directly prop to Fnet
• a is inversely prop to mass

Question 7

Law of Action & Reaction

Answer 7

• For every action there’s = & opposite reaction (in = time too)
• Internal forces are F that cancel bc acting on diff parts of same obj

Question 8

Gravitational field strength & distance have

Answer 8

Inverse square relationship

Question 9

Magnitude of Fg

Answer 9

• Directly prop w/mass
• Inversely prop w/distance

Question 10

Gravitational Force Strength

Answer 10

• increases w/latitude
• Decreases w/altitude

Question 11

Mass

Answer 11

is a property

Question 12

Weight

Answer 12

• is a force interaction
• Directly prop to mass

Question 13

Fg

Answer 13

Force of gravity

Question 14

g

Answer 14

Gravitational of field strength (N/kg or m/s^2)