+1
An electron has a negative charge so losing a charge of -1 from an uncharged, or neutral, atom will leave an ion with a positive charge.
<span>The centripetal force that keeps the lady bug moving in a circle is FRICTION. The Centripetal Force</span><span> is a net force acting on an circling object that sustains constant circular motion. </span>It opposes the motion by acting in opposite direction. A ladybug sits at rest on a turntable that is rotating, during this motion, the ladybug's acceleration vector points <span>toward the center of the turntable.</span>
Mechanical advantage is defined as
MA = 4
now we will have
as we need to pull up a box of weight 200 N
now by above formula we can find how much force it requires to pull up the box
so it requires 50 N force to pull the weight of 200 N
Answer:
(a) 5.25 second
(b) 27.5625 rad
Explanation:
fo = 1.003 x 10^2 rev / min = 1.672 rev / sec
ωo = 2 x 3.14 x fo = 2 x 3.14 x 1.672 = 10.5 rad/s
α = - 2 rad/s^2
(a) Let t be the time taken to stop.
ω = 0 rad/s
Use first equation of motion for rotational motion
ω = ωo + α t
0 = 10.5 - 2 x t
t = 5.25 second
(b) Let it rotates by an angle θ in the given time.
use third equation of motion for rotational motion
ω² = ωo² + 2 α θ
0 = 10.5 x 10.5 - 2 x 2 x θ
θ = 27.5625 rad