Review for: Unit 5 – Forces

#1 All of the following are forces except _____. A. Gravity B. Friction C. Weight D. Inertia

#2 When an object is in a state of equilibrium… A. The net force on the object is zero. B. The object is at rest. C. A and B could be true.

#3 The wider the string on a hanging object the greater the tension. A. True B. False

#4 When drawing force diagrams, the big dot usually represents ______. A. The point of application B. The object’s center of mass C. Both A and B

#5 When drawing a force diagram, the length of a vector indicates _______. A. Direction B. Magnitude C. The distance the object moves

#6 Friction… A. Acts in the opposite direction of motion B. Acts parallel to the surfaces in contact. C. Is caused by interlocking irregularities D. All of these

#7 As the angle of an incline increases _____ increases. A. F Θ B. F // C. F T D. F W

#8 Centripetal force is directed ________. A. Toward the center of an object B. Toward the center C. Toward the center of a circle D. Wherever Chuck Norris decides it should be directed.

#9 When Schlueter was wrecking various vehicles as a teenager what caused the wreck? A. Stupidity B. Schlueter being Schlueter C. Lack of friction between the tires and the ground D. Chuck Norris doesn’t like Mr. Schlueter so he made him wreck to teach him a lesson

#10 Isaac Newton discovered gravity. A. True B. False

#11 In the following picture, the same show rests on three different inclined planes. What remains constant? A. Weight B. Parallel component C. Perpendicular component

#12 As the angle of incline increases _____ decreases. A. Weight B. Parallel component C. Perpendicular component

#13 According to our friction lab, friction depends on all of the following except … A. Nature of the substances in contact B. Area of contact between the surfaces C. Smoothness of the surfaces D. Normal force exerted on the object

#14 If the distance between two objects is quadrupled, the force of gravity between them is… A. Multiplied by 4 B. Divided by 4 C. Multiplied by 8 D. Divided by 8 E. Multiplied by 16 F. Divided by 16

#15 If the mass and the velocity are doubled, what happens to the centripetal force? A. Multiplied by 2 B. Divided by 2 C. Multiplied by 8 D. Divided by 8 E. Multiplied by 16 F. Divided by 16

#16 If the centripetal force is doubled, and the velocity is halved, what happens to the radius? A. Multiplied by 2 B. Divided by 2 C. Multiplied by 8 D. Divided by 8 E. Multiplied by 16 F. Divided by 16

Questions? Comments? Criticisms? Concerns? Complaints?