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# Forces (Part I) Quiz

### Forces Quiz (3/5)

QuestionAnswer
Any push or pull on any object Force
A force has ________ and _________. Strength; direction
What tool is used to measure forces? Springscale
What is the unit used for forces? Newtons (N)
What are some types of forces? (Name the 4 we went over in class in alphabetical order) Applied, friction, gravity, normal
The overall force on an object Net force
To calculate a net force, forces in the same direction should be _________ (added, subtracted) Added
To calculate a net force, forces in the opposite directions should be _________ (added, subtracted) Subtracted
What step is missing from the steps to measuring force using a spring scale? 1. Zero-out scale 2. Determine scale 3. Take measurement 4. ____ _____ Team check
Shows all forces acting on an object Force diagram
What is the force of object with the following forces acting on it: 20N to the right, 20N to the right 40N to the right
What is the force of object with the following forces acting on it: 18N to the right, 16N to the left, 6N to the left 4N to the left
What is the force of object with the following forces acting on it: 35N to the right, 5N to the left, 2N to the left, 11N to the right 39N to the right
What is the force of object with the following forces acting on it: 15N to the right, 14N to the right, 13N to the right, 42N to the left 0N
A nonzero net force (Fnet ≠ 0) that causes an object to accelerate Unbalanced force
If a force is unbalanced, then an object that is not moving will __________ (continue to not move, start moving) Start moving
If a force is unbalanced, then an object that is moving will ________ (continue to move at the same speed, speed up/slow down/turn) Speed up/slow down/turn)
A zero net force (Fnet = 0) that does not cause an object to accelerate. Balanced force
If a force is balanced, then an object that is not moving will ________ (continue to not move, start moving) Continue to not move
If a force is balanced, then an object that is moving will __________ (continue to move at the same speed, speed up/slow down/turn) Continue to move at the same speed
What is the force of object with the following forces acting on it: 8N to the left, 6N to the right 2N to the left
What is the force of object with the following forces acting on it: 15N to the left, 11N to the right, 2N up, 2N down 4N to the left
What is the force of object with the following forces acting on it: 7N to the left, 5N to the left, 13N up, 21N down, 12N to the right 8N down
The amount of matter in an object Mass
The force of gravity pulling on an object Weight
What is the formula for weight? Mass * Gravity
Your mass in Kg = your weight in pounds ÷ ______ 2.2
The gravity on Earth is _____? 9.8 m/sec^2
If Julie weighs 35 lbs (16 Kg), then what is her weight in Newtons? 156.8N
How would Julie's weight change if she was on the moon, where Gravity=1.6 m/sec^2) 25.6N
A force that opposes motion and slows down moving objects Friction
What two factors affect friction? Texture of surface, normal force
Rough surface = ________ friction (Stronger, weaker) Stronger
Normal force increases = Friction _________ (Increases, decreases) Increases
What are the two forms of friction? Static, kinetic
Friction on objects that are stationary Static
Friction on objects that are moving Kinetic
What are the three types of kinetic friction? Sliding, rolling, fluid
Type of kinetic friction in which one surface slides over another Sliding
Type of kinetic friction in which one surface rolls over another Rolling
Type of kinetic friction in which one surface moves through a fluid Fluid
Two women are pushing a car that weights 2500 lbs (1140Kg). The woman in blue can push with 200N and the woman in white can push with 250N. The friction between the tires and the ground is 400N. What is the net force? 50N to the right
What is the name of this law? The force of gravity acts between all objects in the universe. Newtons's Law of Universal Gravitation
The strength of the gravitational force depends on the ______ of objects and the _________ between their centers. Mass; distances
The relationship between the force of Gravity, the mass of two objects, and their distance is...? Fg ≈ (M1 * M2) ÷ d^2
Two bricks are left motionless in outer space with nothing else around them. Will there be a gravitational attraction between them? Yes
Are you attracted to a mountain located 5 Km (3 miles) away? Why aren't you pulled towards that mountain? Yes; the force is small
Are you attracted to the person sitting next to you? Yes
As the mass of the objects increases, the gravitational force between the objects ________. Increases
If the mass of the objects doubles, then the gravitational force ________. Doubles
As the distance between the centers of objects increases, the gravitational force between the objects ___________. Decreases
If the distance between the objects doubles, then the gravitational force will be ________. The inverse of d^2
If the distance between the objects triples, then the gravitational force will be _______. The inverse of d^3
Created by: oliva.muchnik

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