3.1 Work

• Negative work occurs when the force opposes the displacement.


  True
• What is the work done against gravity called?

  $W =$$mgh$
• What is the definition of work in physics?

  Energy transferred by force
• The formula for work is W = Fd cosθ
• The work done is measured in Joules.


  True
• What are the three types of work based on the direction of force and displacement?

  Positive, negative, zero
• Positive work occurs when the angle θ is between 0° and 90°
• Negative work occurs when the force opposes the displacement.


  True
• Under what condition is work zero?

  Force perpendicular to displacement
• Calculate the work done when a force of 10 N is applied over a distance of 2 meters with θ = 0°.

  20 J
• The variable 'F' in the work formula represents the force
• The angle θ in the work formula is measured in degrees.


  True
• What is an example of positive work?

  Pushing a box forward
• Negative work is illustrated by friction slowing down a sliding box
• Carrying a suitcase horizontally results in zero work because the force is perpendicular to the displacement.

  True
• What is the SI unit for work?

  Joule
• In the work formula, 'd' represents the displacement
• What is the range of θ for positive work?

  $0° ≤ θ < 90°$
• Work is the energy transferred when a force causes displacement.

  True
• Match the type of work with its direction and example:

  Positive Work ↔️ Force aids displacement, Pushing a box forward

  Negative Work ↔️ Force opposes displacement, Friction slowing down a box

  Zero Work ↔️ Force perpendicular to displacement, Carrying a suitcase horizontally
• What is the range of θ for negative work?

  90° < θ ≤ 180°</latex>
• Zero work is done when the force is perpendicular to the displacement.


  True
• The SI unit for work is the Joule
• 1 Joule is equivalent to 1 Newton-meter.

  True
• Work is defined as the energy transferred when a force causes an object to move
• What is an example of positive work?

  Pushing a box forward
• Negative work occurs when the force opposes the displacement.


  True
• What is the work equation?

  $W =$$Fd\cos\theta$
• The SI unit for work is the Joule
• Work is dependent on the magnitude of the force, the distance, and the alignment between the force and displacement.


  True
• How many Newton-meters are equivalent to 1 Joule?

  1 N·m
• The SI unit for work is the Joule
• 1 Joule is equivalent to 1 Newton-meter.


  True
• What are the three types of work based on the angle θ between the force and displacement vectors?

  Positive, negative, and zero
• Match the type of work with its angle range and direction:

  Positive work ↔️ 0° ≤ θ < 90°, Force aids displacement

  Negative work ↔️ 90° < θ ≤ 180°, Force opposes displacement

  Zero work ↔️ θ = 90°, Force perpendicular to displacement
• What is the direction of force relative to displacement for positive work?

  Same general direction
• When the force is perpendicular to the displacement, the work done is zero.


  True
• Work done against gravity is calculated using the formula W = mgh</latex>
• What is the value of the acceleration due to gravity (g)?

  9.8 m/s²
• Work done against gravity increases with the height the object is lifted.


  True