1) What is a force? a) A force is pressure exerted b) A force is doing work against one's will c) A force is the pull or push on an object. d) A force is the power developed 2) When can a force be experienced? a) When there is interaction between two objects. b) When an object moves. c) When an object's shape changes. d) When the direction of motion changes. 3) The SI - unit of a force is ..... a) a weight. b) a joule. c) a watt. d) a newton. 4) .................are categories of forces. a) contact and spiritual forces b) contact and action - at - a - distance forces c) action - at - a - distance and spiritual forces d) Illusional an contact forces 5) Frictional forces, tensional forces, normal forces, air resistance forces, and applied forces are examples of ...... a) contact forces b) illusional forces c) action - at - a - distance forces d) spiritual forces 6) Which of the following groups of forces is comprised of action - at - a - distance forces? a) Air resistance, normal forces and spring forces. b) Electric forces, tensional forces and applied forces. c) Magnetic forces, electric forces and gravitational forces d) Air resistance , frictional forces and electric forces. 7) Why is it not enough to state a force for example as 50N? a) because 50N is not the only available value of force. b) because the value of the force is not accompanied by direction. c) because force gravity of gravity has only one direction. d) because a force is not a basic quantity 8) How is a force classified in-terms of physical quantities? a) basic quantity b) dimensional quantity c) applied quantity d) derived quantity 9) What kind of a force is a drag? a) It is a force that opposes forward motion for an object moving in a fluid. b) It is a force that acts at right angle to the fluid in which an object is moving. c) It is a force that acts in a rope along its axis. d) It is a force that acts in opposition to the motion of a fluid. . 10) Weight, buoyancy, normal, drag, friction, tension, elastic, lift and thrust are some examples of a force. Which forces act in fluids only? a) Weight, normal, tension and elastic. b) Friction, buoyancy, drag and thrust. c) Buoyancy, drag, lift and thrust. d) electric , magnetic, gravitational and elastic

Forces - Explain what force is

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