Question

a spring scale rests on a horizontal table. two students pull horizontally at opposite ends of the scale, each with a force of 150 n. what is the reading on the spring scale?
a 0 n
b 75 n
c 150 n
d 300 n

Explanation:

Step1: Analyze the spring scale force

A spring scale measures the tension in the spring. When two forces of 150 N pull in opposite directions (horizontal), the tension in the spring is equal to the magnitude of one of the forces (since the forces are balanced and the scale reads the tension).

Step2: Determine the reading

The force exerted by each student is 150 N, and the spring scale reads the tension, which is equal to the force applied (because the system is in equilibrium, the tension in the spring is 150 N).

Answer:

C. 150 N