It’s moving day, and you need to push a 100 kg box up a

Chapter 6, Problem 46P

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QUESTION:

Problem 46P

It’s moving day, and you need to push a 100 kg box up a 20° ramp into the truck. The coefficients of friction for the box on the ramp are μs = 0.90 and μk = 0.60. Your largest pushing force is 1000 N. Can you get the box into the truck without assistance if you get a running start at the ramp? If you stop on the ramp, will you be able to get the box moving again?

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QUESTION:

Problem 46P

It’s moving day, and you need to push a 100 kg box up a 20° ramp into the truck. The coefficients of friction for the box on the ramp are μs = 0.90 and μk = 0.60. Your largest pushing force is 1000 N. Can you get the box into the truck without assistance if you get a running start at the ramp? If you stop on the ramp, will you be able to get the box moving again?

ANSWER:

Step 1 of 3

 

The mass of the box is,

.

The inclination of the ramp is with the horizontal.

The coefficients of friction are,

 and .

The largest pushing force is,

.

Diagrammatically,

 

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