Use the graph of speed versus time to answer the questions about acceleration. a) which of the cars is speeding up? b) which of the cars is slowing down? c) which of the cars is maintaining a constant speed? (these are questions)

In the given graph, car A is speeding up, Car C is slowing down and car B is maintaining a constant speed with time.

From the given graph we can deduce the following about the change in the speed of the cars with time.

Thus, we can conclude the following from the given graph, car A is speeding up, Car C is slowing down and car B is maintaining a constant speed with time.

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The height of a point on the graph corresponds to a speed on the y-axis.

-- As time goes on, the line for Car-A gets higher. Car-A is speeding up.

-- As time goes on, the line for Car-C gets lower. Car-C is slowing down.

-- As time goes on, the height of the line for Car-B doesn't change. Car-B is maintaining a constant speed.

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle

c. magnitude and direction