Answer:
<h2>Equilibrium</h2>
Explanation:
The pendulum is at rest ( or balance due to the equal action of opposing forces).
Answer:
-929.5Joules
Explanation:
To get the work done by sam, we will calculate the kinetic energy of sam expressed as;
KE = 1/2mv²
m is the mass = 1100kg
v is the velocity = 1.3m/s
KE = 1/2(1100)(1.3)²
KE = 550(1.69)
KE = 929.5Joules
Since Sam is opposing the direction of movement, work done by him will be a negative work i.e -929.5Joules
Answer:
a) ω = 91.1 rad/s
b) KEr = 15.0 J
Explanation:
I = (2/3)mR²
ω = v/R
PE = KE
mgh = ½mv² + ½Iω²
mgh = ½mv² + ½(2/3)mR²(v/R)²
2gh = v² + (2/3)v²
2gh = 5/3v²
v² = 6gh/5
ω² = v²/R² = 6gh/5R²
a. At what rate was it rotating at the base of the hill?
ω = √(6(9.81)(9.00) / (5(0.226/2)²) = 91.1 rad/s
b. How much rotational kinetic energy did it then have?
KE = ½Iω² = ½(⅔)(0.426)(0.113)²(91.1²) = 15.044616
Answer:
because gas molecules have more kinetic energy and are smaller than liquid molecules. diffusion in liquids is slower because the particles in a liquid move more slowly. it happens faster if the temperature is increased