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Unit 5: Forces
5.2 Work Done and Energy Transfer
5.2.1 Calculating Work Done
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The amount of work done depends only on the force applied and the displacement of the object.
False
Work done is maximized when the angle between the force and the displacement is
0
Match the variable with its symbol and unit:
Work Done ↔️ W, Joules (J)
Force ↔️ F, Newtons (N)
Displacement ↔️ d, Meters (m)
If the force is doubled, the
work done
is also doubled.
True
Work done
is the energy transferred when a
force
moves an object through a
displacement
Arrange the factors affecting work done from most to least significant when the force and displacement are in the same direction.
1️⃣ Force applied
2️⃣ Displacement of the object
3️⃣ Angle between force and displacement
When the force and
displacement
are perpendicular, no work is done.
True
Work done
is the energy transferred when a
force
moves an object through a
displacement
Arrange the steps to calculate work done using the formula W = F × d.
1️⃣ Identify the force (F)
2️⃣ Identify the displacement (d)
3️⃣ Apply the formula W = F × d
4️⃣ Include the unit joules (J)
A greater force or displacement results in less work done.
False
What is work done measured in?
Joules
Displacement is the distance the object moves in the direction of the
force
How much work is done if a force of 50 N moves a box 3 meters?
150 J
The force in work done calculations is measured in
newtons
.
True
What are the values of force and displacement in the statement: "A force of 200 N moves a crate 5 meters"?
F = 200 N, d = 5 m
Work done is measured in
joules
How much work is done if a force of 100 N moves an object 5 meters?
500 J
Doubling the force doubles the work
done
Work done is minimized when force and
displacement
are perpendicular.
True
The formula
W = F × d
represents the relationship between work done, force, and
displacement
Force is measured in
newtons
If a force of 50 N pushes a box 3 meters along the floor, the work done is
150
joules.
Steps to identify force and displacement from a problem statement:
1️⃣ Look for a quantity in newtons (N) for force.
2️⃣ Look for a quantity in meters (m) for displacement.
Work Done (W)
is measured in
joules
Match the variable with its description:
Work Done ↔️ Energy transferred when a force moves an object
Force ↔️ The amount of push or pull
Displacement ↔️ Distance moved in the direction of the force
The formula
W = F × d
represents the relationship between work done, force, and
displacement
Force is measured in
newtons
(N)
True
What happens to work done when the force is increased?
Increases
Match the variable with its symbol and units:
Work Done ↔️ W, Joules (J)
Force ↔️ F, Newtons (N)
Displacement ↔️ d, Meters (m)
The displacement in work done calculations is measured in
meters
What is the formula for work done?
W = F × d
Force is measured in newtons.
True
Factors affecting work done in order of relevance
1️⃣ Force applied
2️⃣ Displacement of the object
3️⃣ Angle between force and displacement
What angle between force and displacement maximizes work done?
0 degrees
How much work is done if a force of 50 N pushes a box 3 meters?
150 J
Work done is measured in
joules
(J).
True
A greater force or displacement results in more
work
being done.
True
Match the variable with its symbol and units:
Work Done ↔️ W (Joules)
Force ↔️ F (Newtons)
Displacement ↔️ d (Meters)
In the example "A force of 200 N moves a crate 5 meters," the force is
200
N.
The formula to calculate work done is W = F ×
d
.
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