Energy

• Remember to read systems carefully in order to not get the question wrong

  • Ex: Block earth spring system

    • Energy conserved in the air and when block is on the spring

  • block earth system,

    • energy is NOT conserved when in contact with the spring since the system does not include the spring.

    • Energy is conserved in the air though because only gravity is acting on it

Gravity stuff!!! <3

• Different masses(both are the same in value but different in how they’re measured)

  • Inertial mass is measured by measuring an objects resistance to changes in velocity

  • Gravitational mass describes the force on an object in a gravitational field

• Free fall: only force acting on it is gravity :)

Momentum

• Types of collisions

  • Inelastic: energy is not conserved

    • perfectly inelastic: objects stick together

  • elastic: energy is conserved

• Momentum is ALWAYS conserved

• when blocks are on a ramp, gravity affects the velocity so its an OPEN system not closed

• when not inclined, closed system since no outside force is affecting the velocity ❤