Finally {{CMD_52}} is defined to be accumulated force over a distance. Note, there must be some force {{CMD_53}}in the direction{{CMD_54}} (or opposite direction) that the object is moving for it to be considered {{CMD_55}}work{{CMD_56}}. {{CMD_57}} Which of the following are examples where work of this kind is being done? {{CMD_58}} {{CMD_59}}studying calculus{{CMD_60}} {{CMD_61}}a car applying brakes to come to a stop over a distance of {{MATH_62}}{{CMD_63}} {{CMD_64}}a young mathematician climbing a mountain{{CMD_65}} {{CMD_66}}a young mathematician standing still, holding a {{MATH_67}} page calculus book for {{MATH_68}} minutes{{CMD_69}} {{CMD_70}}a young mathematician walking around with a {{MATH_71}} page calculus book{{CMD_72}} {{CMD_73}}a young mathematician picking up a {{MATH_74}} page calculus book{{CMD_75}} {{CMD_76}} {{CMD_77}} Studying calculus may ``feel'' like work, but it is not (typically) an example of an accumulated force over a distance, and hence no work is done.