Basic Concepts+ Laws

Question 1

distance

Answer 1

the total amount travelled, eg: 20 miles

Question 2

displacement

Answer 2

has magnitude+ direction, eg: 20 miles east

Question 3

speed

Answer 3

total amount travelled in a second, eg: 20 miles per sec
-scalar: always +, has magnitude

Question 4

equation for speed

Answer 4

s=d/t

Question 5

equation for distance

Answer 5

d=s*t

Question 6

velocity

Answer 6

rate at which an object changes position in a specific direction over time

Question 7

equation for velocity

Answer 7

v=Δd/Δt

Question 8

acceleration

Answer 8

how fast a velocity is changing

Question 9

equation(s) for acceleration

Answer 9

a=Δv/Δt or a=(vf-vi)/t

Question 10

kinematic equations

Answer 10

describe the motion of an object w/constant velocity

Question 11

net force

Answer 11

the sum of all the forces acting on an object

Question 12

gravitational acceleration

Answer 12

the object receiving an acceleration due to the force of gravity acting on it
=9.8 m/s^2

Question 13

Newton’s first law

Answer 13

an object at rest will remain at rest unless acted on by a force and an object in motion will stay in motion unless acted on by a force

Question 14

Newton’s 2nd law

Answer 14

F=m*a

Question 15

Newton’s 3rd law

Answer 15

we observe that when one object exerts a force on another object, the 2nd object exerts a force on the first object of the same size, but opposite in direction

Question 16

Newton’s model of gravitational force

Answer 16

every particle attracts every other particle in the universe

Question 17

equation: Newtons model of gravitational force

Answer 17

Fg=-G (m1m2)/|r|^2
G=6.67384 x 10^-11 m/kgs^2