Please help me. A spring with a length of 30 cm is stretched to 36 cm by a mass of 0.1 kg attached to its lower end. The length is further stretched to a length of 40 cm by a certain mass . Determine the mass and state the law used.
3 answers
Please help me I can't get to the right answer
F = k x
where x is how far it is stretched
0.1 kg * g = k (0.36 - 0.30) meters
so
k = 0.1 * 9.81 / (0.06)
then
M * 9.81 = [ 0.1 * 9.81 / (0.06) ] (0.40 - 0.30)
M = 0.1 *0.10 / 0.06 = .167 kg
where x is how far it is stretched
0.1 kg * g = k (0.36 - 0.30) meters
so
k = 0.1 * 9.81 / (0.06)
then
M * 9.81 = [ 0.1 * 9.81 / (0.06) ] (0.40 - 0.30)
M = 0.1 *0.10 / 0.06 = .167 kg
I bet you used the total length and not the amount stretched :)