What formula do I use for the question:
And if the formula contains sin theta, please explain how to do it as well, as I am weak in trigonometry. Thank you!
A body of mass 5 kg is moved _UP_ for 10 meters along a smooth slope of inclination 30 degrees with the horizon. If g = 10 m/s^2, work done will be:
What formula do I use for this?
2016-06-19 2:41 pm
回答 (2)
2016-06-19 2:49 pm
✔ 最佳答案
The weight of the body = m g Component of the weight of body along the plane = m g sin30° = 5 × 10 × (1/2) = 25 N
Force needed to kept the body move along the slope, F = 25 N
Work done = F s = 25 × 10 = 250 J
2016-06-19 2:55 pm
You made my day.
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