Final answer:
The applied force F1 on a wheelbarrow carrying twenty 3 kg bricks depends on the total weight of the load and the mechanical advantage provided by the wheelbarrow. The total weight is calculated by summing the bricks' weight and the wheelbarrow's weight, both affected by gravity and then factoring in the design of the wheelbarrow which allows for a lower input force compared to the output force.
Step-by-step explanation:
To estimate the applied force F1 on a wheelbarrow filled with twenty 3 kg bricks, you would need to calculate the total weight of the bricks and the weight of the wheelbarrow itself. First, calculate the weight of the bricks by multiplying the number of bricks (N) by the mass of each brick (3 kg) and then by the acceleration due to gravity (approximately 9.8 m/s2), to convert mass to weight (force). If the mass of the wheelbarrow is not given, we would have to estimate or measure it.
Once we have the combined weight (total force due to gravity), we can consider the mechanical advantage the wheelbarrow provides due to its design. The longer handle acts as a lever, which minimizes the force you need to apply to lift the load. The mechanical advantage (MA) is the ratio of the output force to the input force, which can be calculated based on the length of the lever arms from the pivot point to the point of effort and the point of load.
However, without specific values for the mass or weight of the wheelbarrow and assuming a frictionless scenario, it's difficult to give an exact value for F1. Instead, we can provide a range of values by considering possible wheelbarrow weights and accounting for some potential frictional forces that could affect the applied force needed.