Question

Acceleration due to gravity $g=9.8\frac{m}{s^2}$. Which of the following is/are correct?

• A. 1 kgf = 9.8 newton
• B. 1 kgf = 980 newton
• C. 1 gf = 9.8 dyne
• D. 1 gf = 980 dyne

Answer 1

Answer: (A), (D)

The correct options are
A

1 kgf = 9.8 newton

D

1 gf = 980 dyne

One kilogram gram force(gf) is the force due to gravity on a mass of 1 kg.

Force due to gravity on one gram mass $1kgf=1\times 9.8=9.8N$

M.K.S unit of force is newton (N).

One gram force(gf) is the force due to gravity on a mass of 1 g.

one gram = 0.001 kg

Force due to gravity on one gram mass $=0.001\times 9.8=0.0098N$

$1newton={10}^{5}dyne$

So, 1gram force (1gf) $=0.0098\times {10}^5$

$1gf=980dyne$

C.G.S unit of force is $dyne$