Final answer:
Aaron did 64.68 Joules of work on his backpack by lifting it 1.5 meters off the ground, with the force applied being the weight of the backpack (43.12 N).
Step-by-step explanation:
To calculate the work done by Aaron in lifting his backpack, we can use the formula for work, which is Work (W) = Force (F) × Distance (d). In the context of lifting, the force applied is equal to the weight of the backpack, which is the mass (m) times the acceleration due to gravity (g).
This acceleration due to gravity is approximately 9.8 m/s2. The distance is the height that the backpack has been lifted, which is given as 1.5 meters.
The weight of the backpack (Force) can be calculated as:
F = m × g
F = 4.4 kg × 9.8 m/s2
F = 43.12 N
Now, we can calculate the work done:
W = F × d
W = 43.12 N × 1.5 m
W = 64.68 J
Therefore, Aaron did 64.68 Joules of work on the backpack.