1/3/7 due Wednesday, April 11th
2/4/6 due Thursday, April 12th
Journal Blue
Our world would be very different if we did not have simple machines. From each location listed below, explain a simple machine you have used or observed and how your life would change if that simple machine did not exist.
Locations- Bedroom Kitchen Car School
OR
Simple machines allow us to do work more efficiently with less effort. Develop your own simple machine that would help someone or something complete work with less effort.
Draw a diagram of your simple machine.
Label the parts of your simple machine.
Explain how your simple machine works and how it allows someone or something to do work with ease and less effort.
Physics Quiz- Tuesday, April 10th
Speed, Velocity, Forces, Newton's First Law of Motion, Simple and Compound Machines
Using the review guide distributed in-class- REVIEW IT TWICE!!!
REVIEW GUIDE ANSWERS-
Name:___________________________
Period:_____
May the Force BE With You
Pre-Assessment
1. What does it mean if an object is in motion?
THE OBJECT HAS A SPEED AND ITS DISTANCE CHANGES FROM POINT A TO POINT B.
2. What is a reference point and why does this reference point have to be stationary (not moving)?
A REFERENCE POINT IS A STATIONARY OBJECT THAT ALLOWS A PERSON TO TELL IF AN OBJECT IS IN MOTION. IT HAS TO BE STATIONARY SO YOU DO NOT GET CONFUSED WHICH OBJECT IS IN MOTION.
3. What two pieces of data do you need in order to figure out the speed of an object?
DISTANCE AND TIME
4. What is the formula used to solve speed?
DISTANCE DIVIDED TIME = SPEED
5. What is the speed of a person who jogs 125 meters in 55 minutes? SHOW YOUR WORK
DISTANCE 125 M
TIME 55 MINUTES
125 M DIVIDED 55 MINUTES = 2.27 M/MIN
6. How is velocity different than speed?
SPEED INCLUDES THE DISTANCE AND THE TIME OF AN OBJECT, WHILE VELOCITY ALSO INCLUDES THE DIRECTION THE OBJECT IS TRAVELING.
7. A hurricane is traveling 210 miles within 3 hours heading West. What is the hurricane’s velocity?
DISTANCE 210 MILES
TIME 3 HOURS
210 M DIVIDED 3 HOURS = 70 MILES/HR W
8. Define Newton’s First Law of Motion.
AN OBJECT AT REST WILL REMAIN AT REST. HOWEVER, AN OBJECT MOVING AT A SPEED WILL CONTINUE AT THE SPEED UNLESS ACTED UPON BY AN UNBALANCED FORCE.
9. Why does a person’s body move forward in a car when someone slams on the brakes? Where is the speed and what is the unbalanced force?
THE BODY MOVES FORWARD BECAUSE IT IS STILL MOVING AT THE SPEED IN WHICH THE CAR IS TRAVELING. THE BODY STILL IS TRAVELING WITH THE SPEED OF THE CAR UNTIL THE UNBALANCED FORCE OF THE SEATBELT PULLS THE BODY BACK INTO THE SEAT.
10. Why is wearing a seatbelt in a car so important and how does this connect to Newton’s First Law of Motion?
WEARING A SEATBELT IS IMPORTANT BECAUSE IT PREVENTS YOUR BODY FROM STILL MOVING AT THE SPEED OF THE CAR AND FLYING THROUGH THE WINDOW. IT IS AN UNBALANCED FORCE (SEATBELT) THAT HOLDS PULLS YOU BACK IN PLACE.
11. What is a force?
PUSH OR PULL EXERTED ON AN OBJECT
Give an example of a force- PUSHING A SHOPPING CART
12. Compare and contrast balanced and unbalanced force.
Unbalanced Force Compare (alike) Balanced Force
1- UNEQUAL FORCES PUSH OR PULL EQUAL FORCES
2-CHANGES DIRECTION EQUALS NET FORCE DOESN’T CHANGE DIRECTION
13. What is a simple machine?
MACHINE THAT ALLOWS YOU TO DO WORK WITH EASE AND LESS EFFORT.
What are the seven types of simple machines?
1-PULLEY 2-GEAR
3-WEDGE 4-INCLINED PLANE
5-LEVER 6-SCREW
7-WHEEL AND AXLE
What is a compound machine?
2 OR MORE SIMPLE MACHINE BUILT INTO A COMPOUND MACHINE
Identify the type of simple machine with each example.
Flag pole-PULLEY
Toilet flusher-LEVER
Binder- WEDGE
Blade of a fan-WHEEL AND AXLE
Stairs-INCLINED PLANE
Water bottle cap-SCREW
Egg beater-GEAR
Review websites------
http://quizlet.com/4282778/
Speed Problems
http://glencoe.mcgraw-hill.
Little Advanced but great overview of forces- but remember you do not
need to know how to solve problems for forces- just the types of
forces
https://docs.google.com/a/
Simple Machines
http://www.edheads.org/
Newton's First Law- We watched this in-class
http://www.teachertube.com/
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