Q174 / 200 · Manipal (MET) 2011 · Physics

A force of 10 N acts on a body of mass 20 kg for 10 s . Change in its momentum is

A
$5 \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
Correct answer
B
$100 \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
C
$200 \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
D
$1000 \mathrm{~kg} \mathrm{~m} / \mathrm{s}$

Solution

$d p=F \times d t$ $=10 \times 10=100 \mathrm{~kg}\mathrm{m} / \mathrm{s}$

Hence, the correct answer is option: 'B'.

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