1. Force and Motion Scoot
Friday, May 12, 2017

2. Force and Motion Scoot Review- Start on an odd number, do not pass, these questions have more reading so take your time and read carefully.
When you are done with Scoot go back to your seat and work on filling in the Forces colored review sheet ( see me for a copy).
BOTH PAPERS NEED TO COME BACK TOMORROW!!
3. Work on Study Guide if you get done early or read a book.
Does anyone have a Study Guide to turn in? I’ll check it if you are finished with everything.

3. Take this paper out as well as a pen to fix your work.
speed
Take this paper out as well as a pen to fix your work.
direction
more
Air resistance
gravity/ air resistance
pulls
pull
rubbing/ touching/moving
Friction/
Inertia
pull

4. faster/farther
Earth
What if the bowling ball and beach ball were dropped on the moon?
bowling
Mass
more
equal
move
not

11. Study Guide Review What is a force? Give examples.
A push/pull that causes an object to move or change.
Ex. Push, Pull, Gravity, Friction, Air Resistance, Inertia
2. What causes an object to move? How do you know it is moving?
A force causes an object to move. An object moves because it changes position away from a reference point.

12. 3. What are balanced forces? Give an example.
Forces that are equal in strength and opposite in direction.
Ex. One person pulls left with 50 N of force while one person pulls right with 50 N of force.
What action/motion can result from a balanced force?
No motion or constant speed
4. What are unbalanced forces? Give an example.
Forces that are NOT equal in strength and opposite in direction
Ex. One person pulls left 100 N of force while one person pulls right with 50 N of force = 50N left.
Ex. Two people push right with 50 N of force right = 100 N right
What action/motion can result from an unbalanced force?
Acceleration happens as a result…. The object can change speed (go faster or go slower) or change direction or both.

13. 5. What is Air Resistance?
Air Resistance is push of air on an object than can change its motion
o Give an example of Air Resistance helping/being used.
Ex. Parachutes holding up a skydiver. Kites floating in the air.
o Give an example of Air Resistance being reduced.
Ex. Aerodynamic car, diver with tight suit and rounded helmet.
Objects dropped on the Moon will fall with the same speed because there is no air resistance.

14. What is Friction?
Force that opposes motion and is caused by rubbing of objects together.
o Give an example of Friction helping/being used.
Ex. Putting sand/gravel down on icy driveway, socks on carpet instead of wood floor, sandpaper on wood block
o Give an example of Friction being reduced.
Ex. Smooth or icy surfaces, adding oil or grease to moving parts in a machine, lotion on hands to remove a ring
o Give an example of a way you would want to increasing friction intentionally.
When your tires slip on icy put down kitty litter or gravel so they stick.
Start a campfire with sticks.
o Why is Friction harmful?
Friction causes heat/fire so it can damage machines if there is too much.

15. 7. What is Gravity?
Gravity is a force of attraction between any two objects that have mass.
o What action/motion can result from Gravity? (Give an example.)
Gravity pulls things back to Earth. Dropping a pen to the floor
8. What is inertia?
Inertia is a force that keeps moving objects moving and stopped objects stopped. “Objects do not like to change what they are doing.”
o How is inertia involved in a car accident?
In a car accident the people in the car keep moving forward until something like the seatbelt or airbag holds them back.
o How is inertia involved in squeezing ketchup out of a bottle?
The ketchup does not want to leave the bottle until you add a lot of force (the squeeze). Then the force of the squeeze keeps the ketchup going out maybe giving you too much.

16. 9. How do you calculate speed
9. How do you calculate speed? (Be able to do this if I give you some numbers.)
Speed = Distance / Time
Speed = 500m / 10 s = 50 m/s
o How does the mass of the object change the speed of an object?
The larger the mass the more force needed to have an object go a faster speed.
The smaller the mass the less force needed to have an object go a faster speed.
o How does the applied force to an object change the speed of an object?
The more force you give an object the faster the speed.
The less force you give an object the slower the speed.

17. Reminder:
Study this weekend! Quiz on Tuesday.