Lesson 1:Forces
Lesson 2:Newton's Laws
Lesson 3:Mechanical Energy
100
Define the word force in simple terms
a push or pull
100
Write the 3 laws of motion using their shortened name by filling in the blanks below:
1st - Law of ___________
2nd - Law of ___ = _______
3rd law _____-______ Law
1st = Law of INERTIA
2nd = Law of F = MA
3rd = Action-Reaction Law
100
Potential energy is energy ____________ due to the object's _____________
Kinetic energy is the energy of ___________
stored
position (or height)
motion (or movement)
200
DAILY DOUBLE
FOR 400 POINTS (CLOSEST ANSWER WINS)
What year did Isaac Newton write and publish his Laws of Motion describing Forces?
1687
200
Which law is best shown by the below image?
Newton's first law, Law of Inertia (dirt stays motionless, racket moves downward because a force is applied to it, but not the dirt. THEN, gravity pulls the dirt down.)
200
A. Point W
300
What 3 things can forces do?
Change speed, change direction, change shape/size
300
In regards to Newton's 2nd Law, What 2 things could you specifically change to a rocket to make it ACCELERATE FASTER? (Note, you cannot change the shape of the rocket)
More Force or Less Mass
300
1) What two variables can you change to INCREASE the KINETIC ENERGY of an object?
2) What two variables can you change to INCREASE the POTENTIAL ENERGY of an object?
1) Add more mass and add more speed
2) Add more mass and add more height
400
Fill in the missing Force amounts for letters A, B, and C, so that the Fnet (Net force) shown below each image is made true
A = 50 Left
B = 200 up
C = 1100 up
400
Which car would produce more force against a wall, or hit harder on a wall? EXPLAIN YOUR ANSWER CHOICE
Trick Question: Both could hit with more force than the other, It depends on how fast they are moving too.
If the large truck is moving very slowly, it will not hit a wall with much force. But if the small car was moving very quickly, it would definitely hit with more force.
F = M x A
400
B
If all speeds are the same, the only difference is mass, and the object with the most mass can cause the most change (or has the most energy)
500
Decide if the following is balanced or unbalanced and explain your answer correctly:
Human floating through space
Balanced, nothing is there to push or pull on the astronaut, therefore no forces = Balanced.
500
Calculate the ACCELERATION of this object:
(Hint: find net force AND THEN use Newton's 2nd law equation)
Step 1) Net force is 75 N (25 + 50)
Step 2) Plug into F=MA --> 75 =(5)(A)
Step 3) Solve for A --> A = 15 m/s2
500
D. Bag B has less kinetic energy than Bag A at the same level as it falls.
Because Bag B has less mass, it will have LESS kinetic energy than Bag A