A box of mass m is sliding down an inclined plane. The plane makes an angle...
A box of mass m is sliding down an inclined plane. The plane makes an angle ϴ with the horizontal ground. What is the magnitude of the component of the gravitational force that is parallel to the inclined plane?
| A. |
m g cosθ |
|
| B. |
m g sinϴ |
|
| C. |
0 |
|
| D. |
m g |
If you lift a 2 kg weight through a vertical distance of 1 m at constant velocity, how much work did you do on the weight? Assume the only two forces that matter are your lifting force and gravity.
| A. |
9.8 J |
|
| B. |
19.6 J |
|
| C. |
6.2 J |
|
| D. |
12.4 |
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