Question

physics help......
i think it has too do with resolving forces....

Answer 1

http://gyazo.com/675071406b651d109711cd10742d6a50

Answer 2

@electrokid

Answer 3

@abb0t

Answer 4

@JFraser

Answer 5

Well Work is force time distance. You must first find the force. The force needed to move the barrel at constant speed is the same as the oposing force to the movement which is the weight in the oposite direction. That means tha the force is the sine of the angle time the weight. So\[F=1 \times 10^{3}Nsin(30) \rightarrow W=Fx= 1 \times 10^{3}Nsin(30)5m=2500J\]

Answer 6

note that It will perform
1) linear motion (if it slides) AND
2) rotational motion. (if it rolls up)

Answer 7

It won't perform rotational motion since there is no friction.

Answer 8

right.