ADVENTURES OF MR. HOPKINS
UNIT 2/3: VELOCITY/
ACCELERATION
ACCELERATION
UNIT 4:
BALANCED FORCES
BALANCED FORCES
UNIT 5: UNBALANCED FORCES
UNIT 6: IMPULSE AND MOMENTUM
100
What is Mr. Hopkins's Favorite Pokemon?
Squirtle
100
What is an object's acceleration if it is moving at a constant velocity of 5 m/s?
0 m/s/s (it has no acceleration)
100
A Force is a ____ or ____ between two objects.
Push/Pull
100
You are stuck in the middle of a frozen, frictionless lake. How can you get to the edge?
Throw something
100
Which would be more difficult to stop: a 6 kg bowling ball moving at 2 m/s, or a 4 kg medicine ball moving at 3 m/s?
The same. they have the Same momentum
200
Which is the Lie?
1) I have achieved the rank of Diamond (top 1%) in League of Legends (TFT)
2) I have achieved the rank of Grandmaster (Top 200 players in North and South America) in StarCraft 2
3) I have achieved the rank of Grand Champion (Top 1%) in Rocket League
I am sadly not very good at Rocket League (yet! growth mindset).
200
What is the equation for acceleration
Acceleration = Change in velocity/change in time
200
Your Spaceship is in deep space and its engines are on. What types of motion are possible:
Not moving
Moving at a constant velocity
Accelerating
Accelerating
200
Fill in the blanks: when the unbalanced (total) force decreases, acceleration _______. when mass decreases, acceleration ________.
decreases/increases
200
A car collides with a wall. an identical car collides head-on with another car. Which car will experience the greater force? Why?
Same. The car has the same change in momentum, and the time to crumple is the same.
300
What was Mr. Hopkins's nickname in High School?
Phil
300
In this DISTANCE vs TIME graph, how far away did Marie get from home?
20 mi
300
Describe two different types of motion where the net (total) force on an object is zero.
Not moving and moving at a constant velocity
300
What feels the greater force: The paintball or the gun?
Which will accelerate more: The paintball or the gun?
Both the paintball and the gun feel the same force. because the paintball has less mass, it accelerates more.
300
In this sticky collision, find the velocity of the cars after the collision.
Using Conservation of Momentum, Their velocities are 11.1m/s to the right
400
Where did Mr. Hopkins go for his Favorite Backpacking Trip?
The Grand Tetons in Wyoming. I went to see the Total Solar Eclipse in 2017!
400
An object has an initial velocity of 0m/s. 5 seconds later, its velocity is 10 m/s. What is the object's acceleration during the first 5 seconds?
2 m/s/s
400
Explain the difference between mass and weight (Gravitational Force).
Mass describes how much "stuff" is inside of an object, while weight measure the gravitational force pulling on that object
400
Rank these accelerations from least to
greatest (ignore direction)
Least --- D, B=C, A --- Greatest
400
If you are stuck in the middle of a frozen, frictionless lake, you cannot push yourself to the edge? Why? Explain this in terms of conservation of momentum
If you are not moving on the lake, your momentum is zero. Since momentum is conserved, you cannot change this yourself. you need another object to have some momentum to cancel out yours.
500
What does Mr. Hopkins NOT have in his pockets right now?
A yoyo
Some googly eyes
A key to his car
A key to his car. I DO have a key to my partner's car, but because I didn't drive my VW I don't have that key on me.
500
What is the acceleration of any object on Earth in a vacuum? (remember the bowling ball and the feather?)
9.8 m/s/s
500
The gymnast has a mass of 60 kg. What is the approximate applied force that the gymnast feels from one of the ropes.
~300 Newtons
500
Fnorm = 50N, Fgrav = 50N, Ffrict = 15N, Fapp = 50N, Mass = 5kg
What is the acceleration?
FTotal=15 N
F=MA
A=3m/s/s
500
IN THE COLLISION BELOW THE TWO CARS STICK TOGETHER. FIND THE VELOCITY AND DIRECTION OF MOTION FOR THE TWO CARS AFTER THE COLLISION 
USING CONSERVATION OF MOMENTUM, THE CARS WOULD MOVE AT 1.67 M/S TO THE RIGHT AFTER THE COLLISION