The blades in a blender rotate at a rate of 6100rpm. When the motor is turned off during operation, the blades slow to rest in 4.7s
What is the angular acceleration as the blades slow down?
f=6100rpm=366000rps
dt=4.7s
w=2(pi)f
angular acceleration=dw/dt
w=2(pi)3.66*10^5=2.3*10^6 rad/s...
a box with a mass of 6.0 kg is accelerated from rest by a force across a floor at a rate of
2.2 m/s^2 for 5.9 s. Find the net work done on the box
m=6.0kg
a=2.2m/s^2
t=5.9 s
a=0 degrees
i know W=Fdcos(a)
and F=ma
so,
F=6.0kg*2.2m/s^2=13.2N
W=13.2N*d*cos0=13.2N*d
I am a...
A woman raises herself in a bucket. How hard must she pull downward to raise herself slowly at constant speed? The mass of the person plus the bucket is 79 kg.
m=79kg
g=9.8m/s^2 (downward)
i know \SigmaF=ma so i end up with 774.2 N. I'm a little lost as where to go now.