 #1
Edel Crine
 89
 12
 Homework Statement:

Starting from rest, an intern pushes a 45kg gurney 40 m down the hall with a constant force of 80 N directed downward at an angle of 35° with respect to the horizontal.
(a) What is the work done by the intern on the gurney during the 15m trip?
(b) How fast is the gurney going when it has moved 15 m?
(c) How much time elapses during the 15m journey? Ignore friction.
 Relevant Equations:
 W=F*x
I'm not sure that does the given distance represent "x" direction? If so, I did...
a) Fx = 80N * cos(35°) = 65.53N
W = F*Δx = 65.53N * (15m) = 982.98 J
b) k = 982.98 J = 1/2 (m)(v2)
v = (√2k/m) = 6.6 m/s
c) vf = vi + at
a = F/m = 1.46 m/s2
t = (vfvi)/a = 4.54 sec
But I'm not sure for I got... h
a) Fx = 80N * cos(35°) = 65.53N
W = F*Δx = 65.53N * (15m) = 982.98 J
b) k = 982.98 J = 1/2 (m)(v2)
v = (√2k/m) = 6.6 m/s
c) vf = vi + at
a = F/m = 1.46 m/s2
t = (vfvi)/a = 4.54 sec
But I'm not sure for I got... h