Question #4 :
What is the amount of energy used to raise a 3000N load 0.4m?
A force of 1000N is used to raise that same load up.
1)State the mechanical advantage of the machine used?
2)Is this machine 100% efficient?
.4 * 3000 = f (in Joules)
1) ma = 0utput / input = 3000N / 1000N
2) not enough info
To solve the above problem, we can use the formula for work done:
Work = Force × Distance
1) To find the mechanical advantage of the machine used, we need to determine the input force and the output force. In this case, the input force is 1000N, which is the force used to raise the load. The output force is the weight of the load, which is given as 3000N.
Mechanical Advantage (MA) = Output Force / Input Force
MA = 3000N / 1000N
MA = 3
Therefore, the mechanical advantage of the machine used is 3.
2) To check if the machine is 100% efficient, we need to compare the work done by the input force to the work done against gravity, which is the force required to raise the load.
Work done by the input force = Input Force × Distance
Work done by the input force = 1000N × 0.4m
Work done by the input force = 400 Joules
Work done against gravity = Weight × Distance
Work done against gravity = 3000N × 0.4m
Work done against gravity = 1200 Joules
Efficiency of the machine = (Work done by output force / Work done by input force) × 100%
Efficiency = (1200 Joules / 400 Joules) × 100%
Efficiency = 300%
Therefore, the machine has an efficiency of 300%, which means it is not 100% efficient.