Answer: W = 18375J
Explanation:
Given;
Mass of bob m= 75kg
Vertical rise of plane d = 25.0m
Angle of elevation = 15°
Acceleration due to gravity = 9.8m/s2
Workdone is given by force time distance.
The workdone by gravity will be given by;
W = F×d
Where F is the weight of bob and d is the vertical distance covered by bob.
F = m*a = m×g
d = 25m
So,
W = m×g×d
W = 75 ×9.8×25
W = 18375J
Note: you may not need the angle of elevation to calculate the workdone by gravitational force.
Or we can also calculate it using
W = mgsinx × d
Where in this case d is the total length travelled on the inclined plane.
(We will still arrive at the same answer)
The Work done will be "18375 J".
Given values are:
Mass of bob,
Vertical rise,
Angle of deviation,
As we know,
→ [tex]W = F\times d[/tex]
or,
→ [tex]W = m\times g\times d[/tex]
By substituting the values, we get
→ [tex]= 75\times 9.8\times 25[/tex]
→ [tex]= 18375 \ J[/tex]
Thus the above approach is right.
Learn more:
https://brainly.com/question/183987
