Newtons Laws
What is the full name of the scientist who formulated the three Laws of Physics?
(Sir) Isaac Newton
What do each of the variables (the letters in the equation) stand for in F=MA?
F=Force
M=Mass
A=Acceleration
What is the formula to find speed?
s=d/t
What are TWO formulas for acceleration?
V2-V1/T or F/m
____ is always found on the X axis
Time
What is Newton's First Law, and what is its name?
The Law of Inertia: An object in motion will stay in motion, and an object at rest will stay at rest, unless it is acted upon by another force.
A boxer punches his opponent at 10m/s2 with his fist, which has a mass of 2kg, what was the force behind his fist?
20N
A boat sails 10km south in one hour. What is its velocity?
10km/h SOUTH
What is the definition of acceleration?
Acceleration is the rate at which an objects' speed changes.
____ is found on the Y axis
Distance or Velocity
What is Newton's Second Law?
F=ma
If a ball rolls down a hill with a force of 80N, and has a mass of 20kg, what is its acceleration?
4m/s2
If you are traveling at 5mph, and need to cover a total distance of 150 miles, how many hours will your journey take you?
30 hours
If a car is driving at 20mph, and speeds up to 80mph once it arrives onto the freeway half an hour later, what is its acceleration?
120mph^2
Finding the slope on a VELOCITY vs TIME graph will give you what?
Acceleration
What is Newtons Third Law, and the name of the law, and an example of this law in action?
The Action Reaction Law: For every action there is an equal and opposite reaction.
Examples will vary
If it takes 20N of force to accelerate a set of weights upward at 30m/s2, how much do the weights weigh?
0.66kg
If a train is traveling 250mph, and it takes you 3 days to complete your journey, how far did you travel?
18000 miles.
-0.066m/s^2
What does a CURVED line on a DISTANCE vs TIME graph show?
Acceleration
THINK!! When a bike is pedaling along the ground, what is PUSHING the bike FORWARD?
The GROUND is what is pushing the bike forward, as the bike tires rotate, they push backwards on the ground, which then has an equal and opposite force moving the bike forward. The same thing happens to cars and other things with wheels.
A ball falls from a plane towards the ground at 10m/s2. If the NET FORCE of the ball is 20N, and it is experiencing 5N of air resistance, how much does the ball weigh?
2.5kg
If school starts at 8:30, and you wake up at 7:30, and your school is 10 miles away, how many miles per MINUTE will you have to run to make it to school on time, AND is this possible?
0.17miles/minute. Yes this is possible.
A car drives 50 miles in 3 hours, then another 50 miles in 3 more hours, what is its acceleration?
Zero mph^2
What does a flat line on a velocity vs time graph mean?
Constant Speed