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It’s moving day, and you need to push a 100 kg box up a
Chapter 6, Problem 46P(choose chapter or problem)
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?
Questions & Answers
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,