P7.1 Work Done

• Work done quantifies the amount of energy spent by a force acting over a certain distance.


  True
• The force and the distance must be in the same direction for the formula to be valid.


  True
• Displacement is the total distance traveled by an object, regardless of direction.

  False
• If a force of 50 N is used to push a box 2 meters, the work done is 100 J.
• Match the scenario with its force and displacement values:

  Pushing a box ↔️ 50 N and 2 m

  Lifting a weight ↔️ 100 N and 1.5 m

  Pulling a sled ↔️ 75 N and 3 m
• $W$ represents the work done, measured in Joules
• Match the variables in the work done formula with their units:

  $W$ ↔️ Joules (J)

  $F$ ↔️ Newtons (N)

  $d$ ↔️ Meters (m)
• How much work is done when pushing a box with a force of 50 N over a distance of 2 meters?

  100 J
• Negative work occurs when force and displacement are in the same direction

  False
• The negative sign in the negative work formula indicates that energy is being removed
• Negative work reduces the overall work done.


  True
• In positive work, the formula is $W =$$F \times d$, while in negative work, it is W = - F \times d</latex> and energy is removed from the system.
• Work done is the ability to do energy.

  False
• What is the unit of both work done and energy?

  Joules (J)
• When you push a box across the floor, you are doing work, which transfers some of your body's kinetic energy to the box.
• Work done in physics is the energy transferred when a force moves an object through a distance
• Match the quantity with its unit of measurement:

  Work done ↔️ Joules

  Force ↔️ Newtons

  Distance ↔️ Meters
• If a force of 50 N is used to push a box 2 meters, the work done is 100 J.
• Work done is calculated using the formula $W =$$F \times d$.


  True
• Force is the effort that changes the state of motion of an object.


  True
• To calculate work done, you need to know the force applied and the distance moved.
• The work done is measured in Joules (J).


  True
• The formula to calculate work done is W = F \times d</latex>


  True
• $d$ represents the distance over which the force is applied, measured in meters
• The work done in each scenario can be calculated by plugging the force and distance values into the formula $W =$$F \times d$ and multiplying
• What is the formula for calculating negative work?

  $W =$$- F \times d$
• If you push a box 2 meters forward and it slides back 1 meter, what is the net displacement?

  1 meter
• Match the type of work with its direction:

  Positive Work ↔️ Force and displacement in same direction

  Negative Work ↔️ Force and displacement in opposite directions
• What is an example of negative work being done?

  Box sliding back
• Energy is the ability to do work
• Work done is a process, while energy is a property.


  True