Name: Class: Date: GRAVITY. 1. Gravity is the force of between all objects. It increases when items are or together.
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1 Name: Class: Date: GRAVITY 1. Gravity is the force of between all objects. It increases when items are or together. 2. The moon has the gravity of Earth. Jupiter has the gravity of Earth. 3. List these items in order from LEAST gravitational force to MOST gravitational force: Atom Earth Sun Moon Human School Building A. B. C. D. 4. Which set of circles would have the MOST gravitational force between them? 5. Which set of circles would have the LEAST gravitational force between them? 6. Who discovered gravity? What unit is gravity measured in? 7. Upward is required to overcome the force of gravity. FRICTION 1. Friction is the force which motion. 2. High friction you down. An example is or a.
2 Decide whether the following friction situations are HELPFUL or HARMFUL? Circle the emoji to show whether you think it is helpful or harmful! Situation Helpful Harmful The brakes on your bicycle. Tires moving your car down the road. Holes in your socks. Your pencil writes on your paper Your engine wears out in your car. The soles of your shoes wear out and lose traction. Heavy items are hard to slide across the carpet. You can erase your mistakes. Kinetic or Static? 1. Kinetic energy is the energy of. Kinetic friction is friction between two surfaces. 2. Examples of kinetic friction: 3. Static friction is the opposite. Static friction is between two surfaces that are. 4. Examples of static friction:
3 Example Moving or Not moving? Kinetic Friction or Static Friction So, remember KINETIC= STATIC= Helpful= Harmful=
4 INERTIA An object in will stay in An object at will stay at UNLESS AN OUTSIDE FORCE ACTS ON IT. The Law of Inertia is First Law of Motion. A ball will keep rolling unless it something or slows it to a stop. A ball will stay still unless it is. NET FORCE Net force is the amount of force. Unbalanced forces have a net force. Balanced forces have a net force of. A balanced force will stay still/the as it was. An unbalanced force will. B or U? Net Force? B or U? Net Force? B or U? Net Force? Direction?
5 Name: Class: Date: GRAVITY 1. Gravity is the force of between all objects. It increases when items are or together. 2. The moon has the gravity of Earth. Jupiter has the gravity of Earth. 3. List these items in order from LEAST gravitational force to MOST gravitational force: Atom Earth Sun Moon Human School Building 1. atom 2.human 3.school building 4.moon 5.Earth 6.Sun A. B. C. D. 4. Which set of circles would have the MOST gravitational force between them? Set A 5. Which set of circles would have the LEAST gravitational force between them? Set D 6. Who discovered gravity? Sir Isaac Newton. What unit is gravity measured in? Newton 7. Upward force is required to overcome the force of gravity. FRICTION 1. Friction is the force which opposes motion. 2. High friction slows you down. An example is grass, or a carpet.
6 Decide whether the following friction situations are HELPFUL or HARMFUL? Circle the emoji to show whether you think it is helpful or harmful! Situation Helpful Harmful The brakes on your bicycle. Tires moving your car down the road. Holes in your socks. Your pencil writes on your paper Your engine wears out in your car. The soles of your shoes wear out and lose traction. Heavy items are hard to slide across the carpet. You can erase your mistakes. Kinetic or Static? 1. Kinetic energy is the energy of MOTION> Kinetic friction is friction between two MOVING surfaces. 2. Examples of kinetic friction: 3. Static friction is the opposite. Static friction is between two surfaces that are NOT MOVING 4. Examples of static friction:
7 Example Moving or Not moving? Kinetic Friction or Static Friction Moving Kinetic Moving Kinetic Not moving Static Moving Kinetic Not moving Static Not moving Static Moving kinetic So, remember KINETIC=MOVING STATIC=STILL/NOT MOVING Helpful= Harmful=
8 INERTIA An object in MOTION will stay in Motion An object at REST will stay at REST UNLESS AN OUTSIDE FORCE ACTS ON IT. The Law of Inertia is NEWTON S First Law of Motion. A ball will keep rolling unless it HITS something or FRICTION stop. slows it to a A ball will stay still unless it is KICKED or PUSHED. NET FORCE Net force is the TOTAL amount of force. Unbalanced forces have a net force >0 N Balanced forces have a net force of 0N A balanced force will stay still/the SAME as it was. An unbalanced force will MOVE/CHANGE B or U? B Net B or U?U Net Force?28 Direction? RIGHT Force?52 N Direction? left B or U? U Net Force?52N Direction? RIGHT
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