Work = (force) x (distance)
80 J = (force) x (4 m)
Force = (80 J) / (4 m) = 20 N
That's IF the force was in the same direction as the 4m of motion.
If the force was kind of slanted, then it had to be stronger, and
it had a component of 20N in the direction of the motion.
Answer:
The ring particles are made almost entirely of water ice, with a trace component of rocky material.
Explanation:
A rolling friction jdisns
Answer
given,
x = 4 t³ - 6 t² + 12
velocity,
For minimum velocity calculation we have differentiate it and put it equal to zero.
.........(1)
putting it equal to zero
24 t - 12 =0
t = 0.5 s
At t = 0.5 s velocity will be minimum.
b) minimum velocity
v = 12t² -12 t
v = 12 x 0.5² -12 x 0.5
v = -3 m/s
c) derivative of velocity w.r.t. time is acceleration
from equation 1
a = 24 t - 12
time at which acceleration will be zero
0 = 24 t - 12
t = 0.5 s
At t = 0.5 s acceleration will be zero.