Question

ろぐちゃん

この問題の解き方を教えて欲しいです。線速度と角速度に関するものです。

Daviu L activ
4. Lawn Mower Blade Problem In order for a
lawn mower blade (Figure 4-4f) to cut grass, it
must strike the grass with a speed of at least
900 in/s.
If the innermost part of the cutting edge is
6 in. from the center of the blade, how many
radians per second must the blade turn? How
many revolutions per minute is this?
b. The blade has a diameter of 19 in. If the out-
ermost tip of the blade hits a rock while turn-
ing as in part (a), how fast could the rock be
hurled from the mower?
T6" 4
19"
6.

線