Question

in which of the following the total change in momentum is zero

Answer 1

Choose in momentum ΔP=FΔt

or ∫dp=∫Fdt

We know that if one area is above time axis & another equal area is below the t-axis

So the integration = 0

as Area + (-Area) = 0

So it is the case

both areas are sames in magnitude (shaded)