NTSE Stage 2 SAT 2019 Exam Question Paper

Question : 63 of 100

Marks: +1, -0

An object of mass 2 kg is moving under the action of a force which varies with time as shown in the figure.

Which one of the following statements is correct for the interval from 0 to 20 s?

Solution:

Area under F-t graph = change in momentum
∴ From the graph,

Δp=1/2×(15+5)×10-1/2×10×5

Δp=100-25

Δp=75kg

m/s

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