1) 1. According to the experiment, when is the most work done? a) a) Pulling the empty box 10 meters. b) b) Pulling the box with 20 books 10 meters. c) c) Pulling the box with 20 books 20 meters. d) d) Pulling the empty box 20 meters. 2) 2. If you apply a force to an object but there is no displacement, what can you conclude? a) a) Work has been done. b) b) The object is too heavy. c) c) No work has been done. d) d) The force was not strong enough. 3) 3. According to the definition of work in this activity, which of the following is required for work to be done? a) a) The object must be heavy. b) b) A force must be applied. c) c) The object must experience displacement. d) d) Both a force and displacement must occur. 4) 4.The force that opposes the motion of the box as you pull it is known as..... a) a) Gravitational force. b) b) Frictional force. c) c) Applied force. d) d) Normal force 5) Why does pulling the box with 20 books require more effort than pulling the empty box for the same distance? a) a) The gravitational force is stronger. b) b) The mass of the box is greater, leading to more friction. c) c) The box is larger. d) d) The rope is longer

JKC Std VI Activity 8: Work (page no. 76)

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