In the system shown in the figure below, a horizontal force Farrowboldx acts on
ID: 1309304 • Letter: I
Question
In the system shown in the figure below, a horizontal force Farrowboldx acts on an object of mass m2 = 8.20 kg. The horizontal surface is frictionless. Consider the acceleration of the sliding object as a function of Fx.
(a) For what values of Fx does the object of mass m1 = 2.30 kg accelerate upward? (Indicate the direction of the force with the sign of your answer. Let the positive x direction be to the right.)
For what values of Fx is the tension in the cord zero? (Indicate the direction of the force with the sign of your answer. Let the positive x direction be to the right.)
Explanation / Answer
a) The mass m1 accelerates upwards, when the force to the right is larger then the weight force of m1: Fx > 9,81*2.3 N=22.563 N
b) the tension in the cord is = 0 when the force accelerates m2 as much to the left as the mass m1 is accelerated by gravitation --> Fx is m2*9,81 N =80.442 N.