Physics Kinematics

Question 1

What does pico mean?
giga?
mega?

Answer 1

pico = 10^-12
giga = 10^9
mega = 10^6

Question 2

If acceleration and velocity point in same direction, what does this mean about speed?
If acceleration points in direction opposite to initial velocity?

Answer 2

Speeding up

Slowing down

Question 3

When a is at an angle between 0º and 90º to v what does this mean?
At an angle 90º to 180º?
90º?

Answer 3

Object’s speed increasing and direction changing
Object’s speed decreasing and direction changing
Object’s direction changing (maybe it’s being swung in a circle)

Question 4

Write out the big five equations

Answer 4

Check iPad

Question 5

Trig

sin, cos of 0, 30, 45, 60, 90

Answer 5

Check for screen shot in ipad for kinematics

Question 6

Equation for gravitational acceleration on diff planets (I think they said don’t worry too much about this)

Answer 6

page 82 or ipad

Question 7

A newton is also equal to…

Answer 7

Kgm^2/s^2

Question 8

Equation for force of kinetic friction

What does a higher mu value mean?

Answer 8

Ff=(muk)(Fn)

More friction surface

Question 9

Newton’s third law
Action-reaction pairs example with person on earth
Ex of common mistake

Answer 9

Newton’s third law applies to pairs of objects
The earth is exerting force of gravity on person and the reaction is the force of gravity that the person exerts upward on the earth
WRONG TO SAY THAT THE REACTION FORCE IS THE NORMAL FORCE (two force acting on the same thing cannot be action-reaction pair, bc action reaction pair are forces acting on two separate objects)
Action-reaction pairs never cancel out bc they don’t act upon the same object