| The inputs m, Fw, g, μ, and θ need no introduction. When entering the mass or weight, you only need to enter one of them and the other will be |
| calculated. Fapp is the applied force and the default inputs are displayed by pressing Play with no inputs. |
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| The output values are displayed in the animation area when pressing Pause. You may press Pause a maximum of three times to display three |
| sets of velocity and time values. After three times, you may still pause the animation but the output values will not be updated.. |
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| The values must be entered before pressing Play. Any values left blank will default to the same values each time. |
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| For an introduction or a review of Newton’s 2nd law, click the PowerPoint link at the bottom of the page. |
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| 1) A 20.0 kg crate is resting on a horizontal surface and the coefficient of friction has been found to be 0.17. A force of 100. N is available to |
| either push or pull the crate. Discuss the differences that exist for each of the following angles: |
| (a) 40° |
| (b) 0° |
| (c) -40° |
| |
| 2) A 25.0 kg mass is pushed by a force of 110. N on a horizontal surface. If the coefficient of friction is 0.30, determine the: |
| (a) acceleration of the mass |
| (b) frictional force |
| |
| 3) A block with a mass of 15.0 kg is pulled to the right with a force of 50.0 N by a rope making an angle of 30° with the horizontal. What are the |
| values of Fh, Fv, Fn, Ff, and Fnet? |
| |
| 4) A crate with a mass of 35.0 kg is pushed with a force of 185 N. The direction of the force makes an angle of 25° below the horizontal. |
| If μ = 0.26, determine the net force acting on the crate. |
