Recent content by sonic91

Thanks for the help I think I've got it down now.

Homework Statement Find equivalent resistance in this circuit. (picture is in the attached files section)Homework Equations Series: Req=R1+ R2. . . Parallel: 1/Req = 1/R1 + 1/R2 . . . The Attempt at a Solution It seems to me that the 2nd 2ohm resistor (the one that's pointed vertically) has 2...

in the problem i have enough info to calculate the moment of inertia: 1/2 *m *r^2 using the given mass and radius of the pulley. 1/2 *4kg*.1^2= .02 kg m

Homework Statement the problem statement is in the pic. Homework Equations inertia for cylinder shape= m*r^2*1/2 torque=F*"length sum of torque= "inertia" * "angular acceleration" w=mg The Attempt at a Solution i was thinking that the weight forces of the masses times the...

for this problem you'll want to start out by drawing a force diagram for the box and then applying Newton's second law.

yeah I've got it figured out now thanks.

Homework Statement Betty weighs 427 N and she is sitting on a playground swing seat that hangs 0.22 m above the ground. Tom pulls the swing back and releases it when the seat is 0.88 m above the ground. The acceleration of gravity is 9.8 m/s2 . How fast is Betty moving when the swing...

did i use the correct method though? thanks for the replying btw.

Homework Statement A sled weighing 52 N is pulled horizontally across snow. A penguin weighing 67.3N rides on the sled,as in the figure. (sorry i can't provide the picture) If the coefficient of static friction between penguin and sled is 0.791, find the maximum horizontal force...