Question

A spring scale reads 20 N as it pulls a 4 kilogram box across a table. What is the magnitude of the force exerted by the mass on the spring scale, if the frictional force is assumed to be equal to zero?

Answer 1

The answer is 40!!!!!!!!!!!!!

Answer 2

Answer:

20N

Explanation:

The same thing happens with your example: the spring scale exerts a force on the mass, and the mass exerts the same force back on the spring: 20Nt.