For calculating work, the force and the distance must be in the same direction
Explanation:
The work done by a force on an object is given by the equation
where
F is the magnitude of the force
d is the displacement
is the angle between the direction of the force and of the displacement
The equation can be rewritten as
where is the component of the force parallel to the displacement of the object. This means that when calculating the work, only the component of the force parallel to the motion of the object contributes to the work: in this sense, we can say then for work to be different from zero, the force must have a component in the same direction as the motion of the object.
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Answer:
Part a)
Part b)
Part c)
Part d)
Part e)
Part f)
Part g)
Part h)
Explanation:
Part a)
Torque due to F1 force is given as
Part b)
Torque due to F2 force is given as
Part c)
Torque due to F3 force is given as
Part d)
Net torque along x direction is given as
Part e)
Net torque along y direction is given as
Part f)
Net torque along x direction is given as
Part g)
angular acceleration is given as
now we have
Part h)
angular speed of the disc after 1.5 s
now rotational kinetic energy is given as
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Answer:
D. john checks all the reviews of an app and reads the permissions before granting access to an app.
Explanation:
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