Physical Science Chapter 12 Section 2 Newton’s Laws: Gravitation

Gravity ● _________is the force of ___________ between ___________with _________. ● We usually think of gravity as the ________ of the __________on things at the _______ ___________ (or near it). ________is the field force that gives us “__________” _______the _________of an object.

Gravity formula ______________ ● Weight is calculated using the ● “g”is the ____________________on an object from ___________________. On Earth, g=__________________ but, the value for g depends on the ________ of the object (planet,etc.).

If you have two objects of same mass, the one on the moon weighs ___________than the one on the Earth. Since __________is a _____________, it can be measured in ________________.

Physical Science: Chapter 12 Newton’s Laws Gravity ● How much would you weigh on other planets : Venus (g =8.9m/s2), Mars (g=3.7) and Neptune (g= 11) Jupiter (g =26)? (Integrating Science on p. 404)

Physical Science: Chapter 12 Newton’s Laws Law of Universal Gravitation ● All objects in the Universe attract each other through the force of ________________. The amount of _____________________ between any _________________can be calculated.

Physical Science: Chapter 12 Newton’s Laws Law of Universal Gravitation The amount of gravitational attraction: ● gets _________as the masses __________ distance between objects ___________________

Physical Science: Chapter 12 Newton’s Laws Mini-Quiz #2 1). What is the definition of gravity? 2). What is the formula for weight? 3). What factor increases the force of attraction between masses? 4). What factor decreases the force of

Effects of Gravity: Free Fall When an object is ___________the Earth’s surface and ____________is the only force acting on it, it will be in ______________. Without ___________, all objects near the Earth’s surface will __________at the same rate (9.8m/s2) regardless of their ________.

Effects of Gravity: Terminal Velocity As gravity pulls an object ___________ Earth and air resistance is __________ against its ________, … When the two forces (____________and _____________are equal, they will reach a constant ______________________. To ________their __________________to land, they need to ______________their ___________________. (Think parachute)

Physical Science: Chapter 12 Newton’s Laws Effects of Gravity: Projectile Motion ● _________________is the ______ path of an object that is launched _________the Earth’s surface.

Effects of Gravity: Projectile Motion ● Projectile motion has a __________________ _______________due to an ___________force. Without __________________acting, the object would go in a _______________line. Projectile motion also has a _____________ component due to ______________. Combining the components of ______________and _____________ motions creates a ______________path.

● The ____________ motion is ________ affected by _______.

Physical Science: Chapter 12 Newton’s Laws Mini-Quiz #3 1). What is free fall? 2). What is terminal velocity? 3). What two forces create terminal velocity? 4). What is projectile motion?

Physical Science: Chapter 12 Newton’s Laws Mini-Quiz #3 5). What two forces create projectile motion? 6). After shooting an arrow, what is the only force acting on a projectile (excluding air resistance)?

Physical Science: Chapter 12 Newton’s Laws Things to Know 1). What is gravity? 2). What is weight & the formula? 3). What two factors determine the amount of gravitational attraction? 4). What is free fall & “g”?

Physical Science: Chapter 12 Newton’s Laws Things to Know 5). What is terminal velocity? 6). What two forces create terminal velocity? 7). What is projectile motion? 8). What two forces create projectile motion?

Physical Science: Chapter 12 Newton’s Laws Chapter 12 Section 2 QUIZ 1). What is formula for weight? 2). What is the value of “g?” (Acceleration due to gravity) 3). If person has a mass of 50kg, what is their weight on Earth in N’s? 4). What TWO factors determine gravitational attraction?

Physical Science: Chapter 12 Newton’s Laws Chapter 12 Section 2 QUIZ 5). What TWO forces determine terminal velocity? 6). What TWO forces create projectile motion?