A mass, which is connected to a string, is placed on a frictionless surface. At the end of the string there is a 1N weight. The string is guided by a frictionless pulley, so that the 1N weight is suspended on air and it is not in contact with any surface.
a) What must be the tension on the string so that the mass slides on the frictionless surface at a rate of 1.45m/s^2?
b) What is the value of the mass if the tension of the string is found to be 1.5N and the mass is now at rest?
2007-10-23 19:54:00 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
a) This problem is defective since the tension is already given as 1N. The question here should be the mass.
In fact 1.45 m/s/s is an acceleration.
F = ma
1 = m(1.45)
m=0.6897 kg
b) In the absence of friction, there is no way for the mass to stay at rest in the presence of tension on the string. I believe this question pertains to a problem where the mass is on an incline.
2007-10-23 22:16:45 · answer #1 · answered by Anonymous · 2⤊ 0⤋
Just a comment:
The question is not very clear.
Take note that the question is as good as the answer.
No clear answer can be obtained from an unclear question.
2007-10-24 03:02:25 · answer #2 · answered by rene c 4 · 0⤊ 0⤋