a. A car is moving along a straight road at a constant speed. b. Acaris moving a

Question

a. A car is moving along a straight road at a constant speed. b. Acaris moving along a straight rosd while slowing down. c. A car is moving along a straight road while speading up. d. A hockey puck slides along a smooth (i.e., frictionless) icy surface. e. A hockey puck slides along a rough concrete surface. f. A cockroach is speeding up from rest. g. A rock is thrown horizontally air resistance is negligible. h. A rock is thrown horizontally, air resistance is substantial. i. A rock is dropped vertically, air resistance is negigible. j. A rock is dropped vertically, air resistance is substantal, Learning Goal: To understand the meaning and the basic applications of Newton's 1st and 2nd lawe. In this problem, you are given a diegram (Figure 1)representing the motion of an abject: a motion diagram. The dots represent the objects position at moments seperated by equal intervals of time. The dols are connected by arows represanting the object's average velocity during the corresponding time interval. Part D Yaur goal is to use this motion diagram to detemine the direction of the net force acting on the object. You will then determine which force diagrams and which situations may correspond to such a motion Which of these situations describe the motion shown in the motion diagram at point A? Type the letters corresponding to all the right answers. Do not use commas. For instance, if you think that only situations c and d are correct, type od Correct Part E which of these situations describe the rnotian shown in th motion diagram at point B? Type the letters corresponding to all the right answers. Do not use commas. For instance, if you think that only situations c and d are correct, type od Figure 1 of 1 Submit Previous Answors Request Answer Incorrect; One attempt remaining Try Again Part F Complele previous partis)

Explanation / Answer

at point b we can see that the velocity of decreases, becuse of the distance between the previous points. hence the velocity is decreasing. hence b e h represent the velocity decreasing

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