What is the force that sisyphus should exert

Reference no: EM1311957

Q1. A 5 m long board is balanced on a point pivot to make a seesaw. A 30 kg child sits on one end of the seesaw, 3m from the pivot. A 47 kg child sits on the opposite end.

a) If the board is equilibrium with both kids off the ground, what is the board's mass?

b) What force is necessary at the pivot to support the seesaw?

Q2. Sisyphus was a character in Greek mythology that was doomed in Hades to push a boulder to the top of a steep mountain. When he reached the top, the boulder would slide back down the mountain and he would have to start all over again. Assume that Sisyphus slides the boulder up the mountain without being able to roll it, although in most versions of the myth, he rolled it.

If the coefficient of kinetic friction between the boulder and the mountainside is 0.4, the mass of the boulder is 20.0kg, and the slope of the mountain is a constant 30.0°, what is the force that Sisyphus should exert on the boulder to move it up the mountain at a constant velocity?

Reference no: EM1311957

Questions Cloud

Categorize the utility functions : Suppose Shaqueena is currently earning income of $23,000 (I =23) and can earn that income next year with certainty.

Possibility of subcommittees : If they must form an ethics subcommittee of 4 members, how many different subcommittees are possible?

What was the cost of goods sold : Calculation of cost of goods sold - what was the cost of goods sold

Rate of return would the firm earn in its asset base : Illustrate what output would be produced, Illustrate what would total profits be also Illustrate what rate of return would the firm earn in its asset base.

What is the force that sisyphus should exert : Sisyphus was a character in Greek mythology that was doomed in Hades to push a boulder to the top of a steep mountain. When he reached the top, the boulder would slide back down the mountain and he would have to start all over again.

Mean number of shoes sold at mall using significance level : At.02 significance level is it sensible to conclude that mean number of shoes sold at mall stores is larger than at outlet stores?

Determine net sales for the two months ended december : Assume that Sales Returns and Allowances, Sales Discounts, and Credit Card Discounts are treated as contra revenues: compute net sales for the two months ended December 31, 2011.

Producers were paid for meeting output targets : In the former Soviet Union, producers were paid for meeting output targets, not for selling products. Under those circumstances.

Computing height at which the water will strike the building : A firefighter at a distance d from a burning building directs a stream of water from a fire hose at angle θi above the horizontal as shown in Figure. If the initial speed of the stream is vi. At what height h does the water strike the building?

User Account

All Pages