giolascalaa
Answered

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Getting a piano into a truck isn't easy, so we often use a ramp to lower the amount of required force. Three students want to use least effort to put the piano into a truck. They have tried ramps with different length- 3 m, 4 m and 5 m. They have observed that the three of them are needed when the length is 3 m, two of them when the ramp is 4 m and just one when the ramp is 5 m.

Sagot :

CrazyBun
Answer: they should use 5m ramp as it requires the least effort from the student.
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