Question

1 newton = __ dyne.

• A. ${10}^{5}dyne$.
• B. ${10}^{7}dyne$.
• C. ${10}^{2}dyne$.
• D. ${10}^{3}dyne$.

Answer 1

The correct option is A

${10}^{5}dyne$.

One newton is the force required to accelerate a body of mass 1kg by $1m{s}^{-2}$.

1 newton= $1kg\times 1m{s}^{-2}$.

= $1000g\times 100cm{s}^{-2}$.

= ${10}^{5}g\times cm{s}^{-2}$.

=${10}^{5}dyne$. $(since1g\times cm{s}^{-2}=1dyne)$

$\therefore$ 1 newton = ${10}^{5}dyne$.