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To be quite honest I don't even know where to start with this problem! Any help or advice would be greatly appreciated thank you

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- Thread starter foozeball2468
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- #1

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To be quite honest I don't even know where to start with this problem! Any help or advice would be greatly appreciated thank you

- #2

Doc Al

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Hint: What's the maximum allowable *acceleration *of the material?

- #3

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wouldnt that be 9.81 m/s^2 but how can I incorporate this into the problem?

- #4

Doc Al

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No, you have towouldnt that be 9.81 m/s^2

Once you find the maximum acceleration, use kinematics to solve for the time.

- #5

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gravity-9.81 m/s^2(down)and the tension 500N (up)

- #6

Doc Al

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Almost right. Gravity acts down with a force (not an acceleration) equal to the material's weight. (What's the weight of the material?)gravity-9.81 m/s^2(down)and the tension 500N (up)

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93 kg

- #8

Doc Al

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That's the mass. Use it to figure out the force of gravity (the weight).93 kg

- #9

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93*9.81=912.33 n

- #10

Doc Al

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Looks good. Keep going.93*9.81=912.33 n

- #11

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okay from here Fnet=T-Fg 412.33=93kg(a) =412.33/93= 4.43 m/s^2

- #12

Doc Al

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Are you sure that the max tension is only 500 N? That's not even equal to the weight of the material. (Sure it's not 5000 N?)The rope is rated to withstand 500N of tension.

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- #14

Doc Al

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Then we need more information, such as the exact arrangement of ropes and pulley. (Post a diagram.) You need to determine the force exerted on the material when the rope is at maximum tension.Yes I am postive that part is straight out of the book,

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- #16

Doc Al

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Good. If the rope tension is 500 N, how much force do the ropes exert up on the pulley/material?

- #17

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I am not quite sure would I divide the tension of 500N by the weight of 93 kg and get 5.4m/s^2 since would the force be 500 N on the object?

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- #18

Doc Al

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No. You aren't ready to calculate the acceleration yet, you still have to determine the net force on the material.I am not quite sure would I divide the tension of 500N by the weight of 93 kg and get 5.4m/s^2 since would the force be 500 N on the object?

Analyze the diagram and figure out how much upward force is exerted on the pulley. Hint: Count how many times the rope pulls up.

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