Recent content by HurricaneH

O_o RE= 1/2Iw^2 1/2(92)(2)^s (46)(4) 184 J...

forgot the weights... y=3m, 4kg, y=-2m, 2kg, y=-4m, 3kg I= (4)(3)^2 + (2)(2)^2 + (3)(4)^2 I= 92kg

Any help will be aprreciated... 1. A car traveling on a flat circular track accelerates uniformly from rest with a tangential acceleration of 1.70 m/s2. The car makes it one quarter of the way around the circle before skidding off the track. Determine the coefficient of static friction...

1. A 75KG man stands in a 100kg rowboat at rest in still water. He faces the back of the boat and throws a 5kg rock out of the back at a speed of 20 m/s. The boat recoils forward 4.2 m.. Calculate the initial recoil spped of the boat, the loss in mecahnical energy due to friction, the effective...

HW help:( Any help will be appreciated. 1. Water flows over a section of Niagara Falls at a rate of 1.2x10^6 KG/s and falls 50m. How many 60W bulbs can be lit with this power? 2. A bullet with a mass of 5g and spped of 600m/s penetrates a tree to a depth of 4cm. Determine the frictional...

ugh, should have been obvious:( so i would have to find t, using the equation X=Xxo+Voxt+1/2axt*2 50=40t + 4.9t^2 solve for t using the quadratic equation then plug in t into Y=Yyo+ Voyt+1/2ayt^2 Yyo= o Voy=20 a= 9.81

Help:( 1) A firefighter, 50m away froma building, directs a hose at an angle of 30*, if the initial speed of the stream is 40m/s, what height does it hit the building? i'm guessing i make a triangle and solve for h tan30= h/50, solve for h, i get 28 m ...but it's not the right...

Well I got it. For 1 b) x=t^2m y=2t^2, for c) a^2 + b^2= c^2, c= velocity. For 2. The angles of the directionals were 36.9 and 53.1, then cos36.9=20.2/x, solve for x, cos53.1= 22.5/x2, solve for x2, add both xs, and you get 62.8 m/s for the magnitude of its centripetal acceleration. For c...

but how do i find out the velocity?

...sorry for doing this, but having trouble with some problems 1) A particle starts from rest at t=0 at the origin and moves in the xy plane with a constant acceleration of a= (2i + 4j) m/s2. After a time t has elaped, determine (a) the x and y components of velocity. (b) the coordinates of...