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Lesson 1
Lesson 2
Lesson 3
Lesson 4
Flight
100
What is positive acceleration and deceleration ?
Positive = increase in velocity Negative = decrease in velocity
100
What is a force and what is it expressed by ?
A push or pull and expressed in Newton
100
What are lubricants ?
Lubricants are substances that are applied to surfaces to reduce the friction
100
What is weight ?
Is a measure of the gravitational force exerted on a object
100
What are the 4 forces of flight ?
Drag,lift,weight,thrust
200
What is the formula for acceleration, give an example and what is acceleration ?
Acceleration is the rate at which velocity changes Acceleration = final velocity - starting velocity /time it takes to change velocity A plane tooking off, a car stopping at a sign, Driving around a corner, Jogging on a winding trail
200
How do you determine net force in the same direction and in opposite direction ?
Same direction 25 S + 20 S = 45 S Opposite directions 12 N -10 N = 2 N
200
What is some ways to increase friction ? ( Give at least 2 )
1 : Make surfaces rougher 2: Increase force pushing the surfaces together
200
What is gravity ?
Gravity is a force of attraction between objectsthat is due to their masses
200
What is drag ?
When you slow down
300
What is motion ?
When an object changes position over time
300
What is net force ?
Results from combining all the forces exerted on an object
300
What is friction ?
Friction is a force that opposes motion between two surfaces that are touching
300
What is Mass ?
Is the amount of matter in an object and its value doesnt change
300
What is lift ?
When something levitates
400
What is the speed of a cockroach ?
1.25 M/S
400
What is the air that you breathe in ?
Air that you breathe in is an unseen receiver of a force called GRAVITY
400
What are some ways for friction to be harmful or helpful ? (Give at least 1 example)
Harmful : Can make a hole in ur socks, can cause the temperature of the car and wear parts down Helpful : Allows the car to move
400
Who is the scientist, date of birth and dead, what did he establish and what does it state ?
Sir Isaac Newton (1642 - 1727) Law of universal gravitation All objects in the universe attract each other through gravitational force
400
What is weight ?
What makes the object heavier
500
How do you determine average speed ?
Average speed = Total Distance Divided by total time
500
What are Balanced and Unbalanced forces ?
Unbalanced: When the net force of an object is not 0 Balanced: When the net force of the object is 0
500
What are ALL the types of friction and give an example for it
Sliding Friction : Sliding an object over the ground Rolling Friction : Rolling an object over the floor Fluid Friction : Swimming Static Friction : ?
500
What are the 2 parts of law of universal gravitation ?
Part 1 : Gravitational force increases as mass increases Part 2 : Gravitational force decreases as distance increases
500
What is thrust ?
Thrust is the force which moves an aircraft through the air