Recent content by chimbooze

Let n and k be positive integers. After calculating several examples, guess a closed formula for: (n \ 0) + (n + 1 \ 1) + ... + (n + k \ k) If it helps, this is the formula for the sum of the nth row of the pascal triangle: (n \ 0) + (n \ 1) + ... (n \ k) = 2^n (n \ 0) means n...

A trough is 2 feet long and 1 foot high. The vertical cross-section of the trough parallel to an end is shaped like the graph of x^6 from x=-1 to x=1. The trough is full of water. Find the amount of work in foot-pounds required to empty the trough by pumping the water over the top. Note: The...

So: sum of F = ma Ff = ma .5(9.8)(5) = 5(a) a = 4.9 Tension of rope: T = ma T = (10 + 5)(4.9) T = 73.5 Thanks a lot. I got it correct.

I partially get it. If Tension force is greater than the static friction force, then the box will move. So just find friction force. Ff = mu x n Ff = .5(9.8)(5) But that isn't the right answer.

1. A horizontal rope pulls a 20kg wood sled across frictionless snow. A 5 kg wood box rides on the sled. The coefficient of static friction for wood on wood is 0.5. What is the largest tension force for which the box doesn't slip? m = 5 kg box, 20 kg sled mu = .5 T = ? 2. F = ma Ff= mu x n 3...