Question

Help with Vectors question?



a) Tyler applies a force of 80N at 10° to the horizontal to pull a cart 20m horizontally. How much mechanical work does Tyler do?

b) A crank is pushed by a 40N force. The shaft of the crank is 18cm long. Find the magnitude of the torque vector, in newton-meters, above the pivot point.

Part b) has nothing to do with part a) by the way.

Please show all work. Thanks :)

Answer 1

work = 80cos10 (20) ?!

Answer 2

Thats the answer to the question?!

Answer 3

Not sure :|
For (a)

Answer 4

80cos10 (20) gives me 1575.69

Answer 5

I think thats too much

Answer 6

80 ( 20) (cos10)

Answer 7

I still get 1575

Answer 8

Nope, yeah your right

Answer 9

I just checked the back of the book :P

Answer 10

any figures to part(b) ?

Answer 11

Answer to b) is 7.2 N (dot)m

Answer 12

Nope, its a word question

Answer 13

Here, try this: http://en.allexperts.com/q/Calculus-2063/2008/6/vectors-1.htm

Answer 14

Cool~
18cm = 0.18m
Moment = Fd = 40x0.18 = 7.2 Nm

Answer 15

Just now,
work done = Fs cos theta

Answer 16

NICE!

Answer 17

Thanks alot!!

Answer 18

:)

Answer 19

It's more like Physics to me :P

Answer 20

LOL

Answer 21

If you have time I still didnt finish one question that I posted

Answer 22

Let me find it