Physics

Problem

A spring balance records a force of

29.4\,\text{N}

for an object at a place where

g = 9.8\,\text{m s}^{-2}

. What is the mass of the object? a)

9.8\,\text{kg}

2.94\,\text{kg}

3\,\text{kg}

2\,\text{kg}

Intuitive explanation

The spring balance reads the normal force, which equals the object's weight when at rest. Weight is the gravitational force pulling down on mass, given by $W = mg$ . To find mass, you just need to rearrange this fundamental relationship and divide the force reading by the gravitational field strength at that location.

Intuitive explanation

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