To answer this problem, we must remember that momentum is
conserved. Therefore,
Initial momentum = Final momentum
In this case we use angular momentum which it is defined
as:
Momentum =0.5 m ω^2
So finding for final angular velocity, ωf:
mi * ωi^2
= mf * ωf^2
120 kg * (0.5 rev / s)^2 = (120 kg + 22 kg) * ωf^2
ωf^2
= 0.2113
ω<span>f = 0.46 rev/s</span>
<span>1. </span>Electromagnetic
radiation are represented in waves. Each type of wave has a certain shape and
length. The distance between two peaks in a wave is called the wavelength. This
value is equal to the speed of light divided by the frequency.
<span>
Wavelength = c/f
Wavelength = 3x10^8 / </span><span>2.0 x 10^6</span>
Wavelength = 150 m
Answer:
Graphing the momentum against the change in moment yields a linear relationship.
Explanation:
This is an impulse experiment,
I = ∫ F .dt
where the force and time of the collision are measured, therefore if we assume an average force the integral reduces to
I = F t
Furthermore, the momentum is equal to the change in moment of the ball, this change in moment can be found using the energy relations measuring the height of the ball and calculating its speed, in the two intervals for the descent and for the exit, possibly the heights are different so the moment change is different from zero.
Starting point. Higher
Em₀ = U = mgh
Lower end point, just before hitting the scale
= K = ½ m v²
in the path in the air there is no friction
Em₀ = Em_{f}
m g h = ½ m v²
v =
this height is different for the descent and ascent of the ball, so we have two moments
Δp =
- p₀
Δp = m (v_{f} -v₀)
therefore we have the relationship
I = Δp
Graphing the momentum against the change in moment yields a linear relationship.
Well, when you want to accomplish a goal, you can't take forever to do it now can you? No. The purpose of setting a deadline for your goal is for motivation. You become motivated to do it, instead of putting it off for later. You want to get it done in a reasonable amount of time.