3) The boulder travelled for a distance of 10 m
4) The work done on the car is zero
Explanation:
3)
The work done by a force on an object is given by:
[tex]W=Fd cos \theta[/tex]
where
F is the magnitude of the force
d is the displacement
[tex]\theta[/tex] is the angle between the direction of the force and of the displacement
In this problem we have:
F = 24 N
W = 240 J
[tex]\theta=0^{\circ}[/tex], assuming that the force is applied in the same direction as the displacement
Therefore, we can find d, the displacement of the boulder:
[tex]d=\frac{W}{F cos \theta}=\frac{240}{(24)(cos 0)}=10 m[/tex]
4)
As in the previous exercise, the work done is
The work done by a force on an object is given by:
[tex]W=Fd cos \theta[/tex]
In this problem, we have:
F = 9000 N is the force applied
d = 0 is the displacement, since the car has not moved
Therefore, the work done on the car is
[tex]W=(9000)(0)(cos 0)=0[/tex]
So, no work is done on the car.
Learn more about work:
brainly.com/question/6763771
brainly.com/question/6443626
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