There are not enough electrons in atoms to affect the total mass, so the total mass is just the weight of the protons and neutrons.
Answer:
) the uniform disk has a lower moment of inertia and arrives first.
Explanation:
(a) the uniform disk has a lower moment of inertia and arrives first.
(b) Let's say the disk has mass m and radius r, and
the hoop has mass M and radius R.
disk: initial E = PE = mgh
I = ½mr², so KE = ½mv² + ½Iω² = ½mv² + ½(½mr²)(v/r)² = (3/4)mv² = mgh
m cancels, leaving v² = 4gh / 3
hoop: initial E = Mgh
I = MR², so KE = ½MV² + ½(MR²)(V/R)² = MV² = Mgh
M cancels, leaving V² = gh
Vdisk = √(4gh/3) > Vhoop = √(gh)
Hey!
-----------------------------------------------
Formula:
speed = distance ÷ time
-----------------------------------------------
Solution:
Distance is 60 meters.
Time is 60 seconds.
speed = 60 / 60
speed = 1 meters/seconds
-----------------------------------------------
Answer:
1 meters/seconds.
-----------------------------------------------
Hope This Helped! Good Luck!
