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A crate weighing 500 pounds was delivered to the gym & set on the floor. To

move it, we need to get a set of dolly wheels under the edge. If we use a 15 foot

pry bar to lift the edge and place a 12 high fulcrum back 2 feet from the box,

how much downward force will need to be applied to the bar to raise the crate?

Respuesta :

The downward force that will be needed to be applied to the bar to raise the crate is 389.65N.

How to calculate the force?

From the information given, we'll first need to find the length of BC. This will be:

BC = 15 - (✓2 + ✓1)

BC = 15 - ✓5

The weight of the box will be:

= mg = 500 × 32.174 = 16087.05ft/s²

The force will then be:

= (16087.05 × ✓5)/(15 - ✓5)

= 389.65N

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