Question

A boy of mass 50 kg accelerates at 2 m/s when a force acts on him. Find the force and also find his weight.

Answer 1

${\large{\pmb{\sf{\underline{RequirEd \: Solution...}}}}}$

${\bigstar \:{\pmb{\sf{\underline{Given \: that...}}}}}$

Mass of boy = 50 kilograms

• Acceleration = 2 m/s sq.

${\bigstar \:{\pmb{\sf{\underline{To \: find...}}}}}$

• Force act on him

• Weight of the boy

${\bigstar \:{\pmb{\sf{\underline{Solution...}}}}}$

• Force act on him = 100 N

• Weight of the boy = 490 N

${\bigstar \:{\pmb{\sf{\underline{Using \: concepts...}}}}}$

»»» F = ma

»»» W = mg

• (Where, m denotes mass , g denotes acceleration due to gravity , a denotes acceleration , F denotes force , W denotes weight)

${\bigstar \:{\pmb{\sf{\underline{Knowledge \: required...}}}}}$

» Universal value for g is 9.8 m/s²

» Newton is using SI for force

» Newton is using SI for weight too

${\bigstar \:{\pmb{\sf{\underline{Full \: Solution...}}}}}$

~ Firstly let us find out the force by using suitable formula!

⇒ F = ma

⇒ F = 50(2)

⇒ F = 50 × 2

⇒ F = 100 N

⇒ Force = 100 Newton

~ Now let's find out the weight by using suitable formula!

⇒ W = mg

⇒ W = 50(9.8)

⇒ W = 50 × 9.8

⇒ W = 490 N

⇒ Weight = 490 Newton