A spring scale reads 30 N.while pulling a mass of 6 kg across a surface. What is the magnitude of the force exerted by the mass on the spring scale? a 24N b 5N C 36N d 30 N

## Step 1<br />The problem involves the application of Newton's Third Law of Motion. This law states that for every action, there is an equal and opposite reaction. In this context, the action is the force exerted by the spring scale on the mass, and the reaction is the force exerted by the mass on the spring scale.<br /><br />## Step 2<br />The spring scale reads 30 N, which means it is exerting a force of 30 N on the mass. According to Newton's Third Law, the mass will exert an equal and opposite force on the spring scale.<br /><br />## Step 3<br />Therefore, the magnitude of the force exerted by the mass on the spring scale is also 30 N.