Projectile Motion
- Velocity in the y-direction determines time in the air
- Launching/throwing something at 45 degrees is the optimal angle for the greatest horizontal distance traveled (balances time in the air with the distance traveled)
Range- Total horizontal distance
Maximum height- Comes when Vy = 0
Instantaneous velocity is tangent to the trajectory
Maximum height- Comes when Vy = 0
Instantaneous velocity is tangent to the trajectory
Below is a very important conceptual question that is essential to understanding projectile motion.
Mastering Physics Packet #1 - Projectile Motion.pdf | |
File Size: | 6335 kb |
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Uniform Circular Motion
- Angular Velocity- How many times an object makes a revolution per unit of time
- Measured in rpm (rotations per minute) or ω (radians per second)
- We will use ω which equals 2pi/T (T is the period, or the time it takes to make 1 revolution)
- Linear Velocity = Angular Velocity * Radius
- v = ω * r
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To the right are some very important equations for Uniform Circular Motion. Since the centripetal force is the same thing as the net force, you can use the equation for centripetal acceleration and relate it to Newton's Second Law
Conceptually, the equation for centripetal acceleration makes sense because both a smaller radius of a turn and a greater speed make it more likely for a car to skid. |
Mastering Physics Packet #2 - Uniform Circular Motion.pdf | |
File Size: | 6452 kb |
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Universal Law of Gravitation
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The Force of Gravity is directly proportional to the mass of the object, and inversely proportional to the distance squared
- Mass of one object doubles = Fg doubles
- Mass of one object triples and mass of one object doubles = Fg * 6
- Distance is doubled = Fg decreases by a factor of 1/4
- 1/3 mass and 3 distance = 1/27 Fg
The equation Fg = m * g is just a simplified version of the Universal Law of Gravitation because g is the gravitational field strength. Assuming the object is either on the planet's surface or close, you can see that g is affected by both the mass and the radius of the planet.
Mastering Physics Packet #3- Universal Law of Gravitation.pdf | |
File Size: | 502 kb |
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