# brain freeze on this

• Feb 21st 2013, 11:52 PM
tomjay
brain freeze on this
A mass of 0.5 kg is suspended from a flywheel as shown in FIGURE 2. If the mass is released from rest and falls a distance of 0.5 m in 1.5 s, calculate:
(a) The linear acceleration of the mass.
(b) The angular acceleration of the wheel.
(c) The tension in the rope.
(d) The frictional torque, resisting motion.
Attachment 27181
• Feb 22nd 2013, 12:21 PM
Bashyboy
Re: brain freeze on this
For part (a), a helpful initial step would be to calculate the average speed. Can you do that? v_avg = total distance traveled/time. After you have calculated that, ponder on how the following formula may be of some advantage: $v_{avg} = \frac{v_f + v_i}{2}$
• Feb 27th 2013, 04:41 AM
Bashyboy
Re: brain freeze on this
Of the variables in the average velocity formula, which variables do you know? You certainly know a_avg, because I told you to calculate it. Are there anymore, besides this one?
• Mar 25th 2014, 03:16 AM
tomjay
Re: brain freeze on this
v_avg = 0.15 m/s2

v_f = v_avg X 2 => 0.3m/s2

still lost from here sorry