Question

(a) A particle of mass 2 kg is initially at rest. A force acts on it whose magnitude changes with the time. The force-
time graph is shown below. Find the velocity ofthe particle after 10 s​

Answer 1

Answer:

$\huge \star \huge \underline \red{question}$

➡ A particle of mass 2 kg is initially at rest. A force acts on it whose magnitude changes with the time. The force-

time graph is shown below. Find the velocity ofthe particle after 10 s

$\huge \star \huge \underline \red {answer}$

$area = mv - mu \\ \\ ( \frac{1}{2} \\ \\ \times 2 \times 10) + (2 \times 10) \\ \\ + ( \frac{1}{2}(10 + 20) \times 2) + \frac{1}{2} \times 4 \times 20 \\ \\ = mv - mu \\ \\ 10 + 20 + 30 + 40 = 2v - 0 \\ \\ 2v = 100 \\ \\ v = 50 {m}^{ - 1} \\ \\ \\ \huge \blue{solved....}$

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