The *blank* of the line on a velocity vs. time graph represents acceleration

the slope of the line on a velocity vs. time graph represents acceleration

Explanation:

Acceleration is equal to the ratio between the change in velocity of an object and the time taken:

On a velocity-time graph, this ratio corresponds to the slope of the line. In fact, corresponds to the increment in the y-value (the velocity), while corresponds to the increment in the x-value (the time), therefore their ratio corresponds to the definition of slope of the line.

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.

explanation:

the masses of the objects and the distance between them