Answer:
1568N
2195.2J
Explanation:
Given parameters:
Mass of the weight = 160kg
Distance = 1.4m
Unknown:
Force applied to lift the weight = ?
Energy expended = ?
Solution:
The force applied in moving a body with a given mass through a distance is the weight;
Force applied = mg
Where m is the mass
g is the acceleration due to gravity
i. Applied force = 160 x 9.8 = 1568N
ii. The energy used to lift the weight is given as;
Energy = mgh
h is the vertical distance
Energy = 1568 x 1.4 = 2195.2J
Any fuel such as coal, petroleum (crude oil) or natural gas that has developed within the Earth over millions of years from the decayed remains of bacteria, plants or animals
Answer:
False
Explanation:
According to the AISI (SAE) statements the last two numbers of the designation indicates the porcentage of carbon in the steel. And the firs numbers indicate the most important alloy alements.
In the case of the AISI 1045 indicates that the composition of this steel is 0,45% of carbon.
Answer:
0.2 m/s
Explanation:
The velocity of a point on the edge of a disk rotating disk can be calculated as:
Where 
is the angular velocity and r the radius of the disk. This leads to:
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