. 1. F, T, Fw. Fj, or FN? 2. A mass is pulled to the right while on a table Normal force A surface pushing up A. Label the forces. _Force of friction from below. 5 kg B. Calculate the Weight Any push or pull. object's weight. Applied force Resists change of Tension motion. Exerted by a string Increases with rough surfaces. or rope. Caused by gravity. Always pulls downward. Is equal throughout. Is always perpendicular to a surface. 3 . Calculate the weight of a 7 kg object. 5. A. Label the forces on the above object. B. Which ones are y-direction forces? C. Which ones are x-direction forces? 4. Calculate the mass of a 65 N object. 10. Static friction, Kinetic friction, or Air friction? A. Depends on the roughness of the surface. B. Between tires and the road, normally. C. When an object is at rest. rope I rope 2 What force is act- D. When an object slides. M1 M2 ing on all four of E. Gripping friction. the masses? F. ope 3 Increases with speed. G . When you slip on ice. M3 7. What force is H. Resists the motion of an object. NOT acting on the Keeps a falling object from speeding up rope hanging masses? forever. MA 8. If MI = 2 kg, 1 1. What kind of force is keeping what is Fwi? the man from falling thru the wall ? M2 9 . If there IS friction on 12. Draw all of the forces acting the table, draw the on the man. forces acting on M2. 13. What force cannot be acting on the objects? 6 kg 9 kg 14. On the diagram at the left draw all of the forces acting on M1- 200 nope 2 rope I 15. Draw the force diagram for M2. M2 below. 16. Label the two shown forces acting on the 6 kg mass, giving actual numbers if you know them. rc M1 M2 17. If the 9 kg object moves down and there IS friction on M3 the ramp, label all of the other forces acting on the objects