Untitled Flashcards Set

1. Kepler’s Third Law (Orbital Period & Distance)

Look for:

• "How long does it take to orbit?"

• "Same/larger/smaller orbit"

• "Proportional to distance"

Equation:

(T1T2)2=(r1r2)3(T2​T1​​)2=(r2​r1​​)3

2. Conservation of Momentum (Collisions, Push-Offs, Recoil)

Look for:

• "Pushes off," "jumps," "separates," or "collides"

• "What is the velocity of the other object?"

• "Before and after motion"

Equation:

m1v1+m2v2=m1v1′+m2v2′m1​v1​+m2​v2​=m1​v1′​+m2​v2′​

3. Change in Momentum (Impulse & Reversals)

Look for:

• "Change in momentum"

• "Bounces back," "reverses direction," or "impulse"

• "Before and after speed"

Equation:

Δp=mvfinal−mvinitialΔp=mvfinal​−mvinitial​

4. Centripetal Force (Circular Motion, Tension, Maximum Speed)

Look for:

• "String," "spinning," or "circular motion"

• "Tension," "centripetal force," or "maximum speed"

• "Radius of the circle"

Equation:

Fc=mv2rFc​=rmv2​

5. Orbital Velocity (Planetary Motion, Satellites, Spacecrafts)

Look for:

• "Orbital speed" or "velocity of a planet/moon/satellite"

• "Mass of the Sun or planet"

• "Distance from the center"

Equation:

v=GMrv=rGM​​

6. Newton’s Law of Gravitation (Force Between Two Objects)

Look for:

• "Gravitational force between two objects"

• "Mass of two objects and distance apart"

• "How gravity changes with distance"

Equation:

F=Gm1m2r2F=Gr2m1​m2​​

7. Acceleration Due to Gravity on a Planet

Look for:

• "Gravity on Mars, the Moon, or another planet"

• "Weight of an object on a different planet"

Equation:

g=GMr2g=r2GM​

8. Maximum Speed Without Slipping (Friction & Circular Motion)

Look for:

• "Car driving in a circle," "turning without skidding," or "coefficient of friction"

• "What is the maximum speed?"

Equation:

v=μgrv=μgr​

9. Weight Conversion (Newton to Pounds & Vice Versa)

Look for:

• "Convert Newtons to pounds" or vice versa

• "Weight on another planet"

Equation:

1 lb=4.45 N1 lb=4.45 N