6 J of work is needed to push an object of mass 2 kg from point A to point B of

Question

6 J of work is needed to push an object of mass 2 kg from point A to point B of the frictionless inclined plane as shown in Fig. 8-9. If the angle of inclination is 30°, the height of the plane is h, what is the length of the inclined plane? Use g = 10 m/s2.

6 J of work is needed to push an object of mass 2 kg from point A to point B of the frictionless inclined plane as shown in Fig. 8-9. If the angle of inclination is 30°, the height of the plane is h, what is the length of the inclined plane? Use g = 10 m/s2.

Explanation / Answer

0.6 m

from the given data, workdone = m*g*h

6 = 2*10*h

==> h = 6/20

= 0.3 m

from figure, s = h/sin(theta)

= 0.3/sin(30)

= 0.6 m <<<<<<----------Answer

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