Newton's First and Second Laws

Question 0

inertia

Answer 0

tendency of object to resist change in motion

more mass means more inertia

Question 1

Newton’s First Law

Answer 1

An object at rest will remain at rest; and object in motion will continue to move in a straight line path with constant velocity as long as no forces act on object

Question 2

contact forces

Answer 2

push or pull (touches object)

Question 3

friction

Answer 3

opposes sliding motion

Question 4

normal

Answer 4

surface on object

Question 5

tension

Answer 5

pull of a rope or a cable

Question 6

weight

Answer 6

force due to gravity

Question 7

formula for weight

Answer 7

weight=mass x acceleration

Question 8

Net Force

Answer 8

the total amount of force on an object

Question 9

What unit must mass be in when calculating the net force?

Answer 9

kg

Question 10

What unit must acceleration be in when calculating the net force?

Answer 10

m/s^2

Question 11

Newton’s Second Law

Answer 11

The acceleration of an object is directly proportional to the net force and inversely proportional to the mass.

Question 12

What is the formula to find acceleration?

Answer 12

a=Fnet/m

Question 13

What is the formula to find the net force?

Answer 13

Fnet=mass x acceleration

Question 14

What is the formula to find the force of gravity?

Answer 14

Fg=mass x 9.8

Question 15

Steps for solving force problems

Answer 15

Draw free-body diagrams with forces
Determine Fnet
use Newton’s second law to solve for the variable you want
use equations from unit 2

Question 16

When Fnet=0 what does a=?

Answer 16

0 m/s^2