Aspring has a spring constant of 81 n · m−1. what is the force (in n) required to do the following? (enter the magnitude.) (a) compress the spring by 6 cm n (b) expand the spring by 17 cm n

Explanation:

It is given that,

Spring constant, k = 81 N/m

We need to find the force required to :

(a) Compress the spring by 6 cm i.e. x₁ = 6 cm = -0.06 m

It can be calculated using Hooke's law as :

F = - k(-x₁)

F = 4.86 N

(b) Expand the spring by 17 cm i.e. x₂ = 17 cm = +0.17 m

So, F = -kx₂

F = -13.77 N

Hence, this is the required solution.

found in the nucleus

has mass of one amu

d.7.5cm is your answer