2.4. Work, Energy, and Power

• Work is defined as the product of the force applied and the displacement in the direction of the force
• Kinetic energy is the energy an object possesses due to its motion
• Order the energy transformations in a falling object:

  1️⃣ Gravitational potential energy

  2️⃣ Kinetic energy
• Potential energy is the energy stored in an object due to its position or condition
• The law of conservation of energy states that energy can neither be created nor destroyed, only transformed.

  True
• What is the formula for work when the force and displacement are at an angle θ?

  W = F \cdot d \cos \theta</latex>
• An object with a mass of 5 kg moving at 10 m/s has a kinetic energy of 250 J.


  True
• What does the law of conservation of energy state?

  Energy cannot be created or destroyed
• What is the formula for power?

  $P =$$\frac{W}{t}$
• The formula for work is $W =$$F \cdot d \cos \theta$


  True
• The formula for kinetic energy is $K =$$\frac{1}{2} m v^{2}$


  True
• Work is defined as the product of the force applied and the displacement in the direction of the force
• The formula for gravitational potential energy is $U_{g} =$$mgh$


  True
• Order the energy transformations in a falling object:

  1️⃣ Gravitational potential energy

  2️⃣ Kinetic energy
• Work is positive if the force and displacement are in the same direction
• Potential energy is the energy stored in an object due to its position or condition
• As a ball falls, gravitational potential energy is converted into kinetic energy.


  True
• Match the symbol with its meaning:

  W ↔️ Work done

  F ↔️ Force applied

  d ↔️ Displacement

  θ ↔️ Angle between force and displacement
• In the kinetic energy formula, $m$ represents the object's mass
• Match the symbol with its meaning:

  K ↔️ Kinetic energy

  m ↔️ Mass

  v ↔️ Velocity
• In the elastic potential energy formula, $k$ represents the spring constant
• Work is defined as the product of the force applied and the displacement in the direction of the force
• What is the formula for kinetic energy?

  $K =$$\frac{1}{2} m v^{2}$
• Match the type of potential energy with its definition and formula:

  Gravitational ↔️ Energy stored due to height, $U_{g} =$$mgh$

  Elastic ↔️ Energy stored in a spring, $U_{e} =$$\frac{1}{2} kx^{2}$
• Power is the rate at which work is done or energy is transferred