A block is placed on a inclined plane. The acceleration of gravity is 9.8 m/s². 31 N 16° L--- W μ = 0.27 22° A 31 N force is required to push the block up the incline with constant velocity. What is the weight of the block? Answer in units of N. 1. 58.9261 2. 30.231 3. 33.6485 4. 46.572 5. 42.4204 6. 43.991 7. 69.5833 8. 50.0524 9. 64.0072 10. 26.3637

8. An object is pulled across a rough horizontal surface with an applied force of 300 N [40o below the horizontal]. The applied force is slowly rotated down toward the horizontal, decreasing the 40o angle. What will happen to the force of friction acting on the object and the acceleration? a. Both increase.b. Both decrease.c. Friction decreases and acceleration increases.d. Friction increases and acceleration decreases.e. None of the above statements are accurate.

0 cm 10.0 cm 35.0 N 45.0 cm xcm 30.0 N 3. What is the value of the force at 40.0 cm in the diagram below? 0 cm 40.0 cm 25.0 N (x) N 50.0 cm 100.cm 30.0 N

4. A 50.0-kg crate is being pulled along a horizontal smooth sSurface. The pulling force is 10.0 N and is directed 20.0° above the horizontal. What is the magnitude of the acceleration of the crate? A) 0.0684 m/s2 B) 0.188 m/s2 C) 0.200 m/s2 D) 0.376 m/s2 E) 0.0728 m/s2 Final formula: Required steps: 1) Draw free body diagram 2) Choose reference frame 3) Find vectors components 4) Apply Newton's 2nd law 5) Solve for a algebraically 6) Check units 7) Substitute numerical values