Here are the answer options for the questions in the picture! A) 20 joules of work is done by the object
B) 10 joules of work is done by the object
no work is done by the object
C) 70 joules of work is done on the car
D) 100 joules of work is done by the car
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each question belongs to one of these answers i have answered some but I got them wrong

real, smaller and upside-down.   so the answer should be b.

see earlier

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

-reverse card

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.