What are the three examples that show relation between pressure and area in daily life.
1 answer:
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Answer:
Work one by the force, W = 1378.87 lb-ft
Explanation:
It is given that,
Force acting on the sled, F = 20 lb
Angle between the force and the horizontal, θ = 40°
Distance moved, d = 90 ft
We need to find the work done by the force. We know that the work done can be calculated as :
W = 1378.87 lb-ft
So, the work done by the force is 1378.87 lb-ft. Hence, this is the required solution.
Answer:
The slope of the line is zero
The object is at rest
Explanation:
The graph position vs time of an object represents the position of the object measured at different times.
The slope of this graph is given by:
where
is the increment in the y-variable
is the increment in the x-variable
However, we have that:
corresponds to
, the change in position of the object
corresponds to the change in time,
Therefore, for a position-time graph the slope of the graph corresponds to the velocity of the object:
An object having a flat line on a position-time graph has a line with slope zero: therefore, its velocity is zero, and this means the object is at rest.