Answer:
The amplitude of oscillation is <u>0.07698m</u>
Explanation:
The given motion is an example of Simple Harmonic Motion (SHM).
For a simple harmonic spring-block motion the angular frequency (w) is given by -
w = -- 1
,where k=spring constant of the spring and m=mass of the block.
We know that time period of SHM is given by -
T = = 0.467
∴ w = = = 13.45
The general equation of motion -
x = A sin(wt+∅) , where A : Amplitude of oscillation
t : time
∅ : phase difference of oscillation
x : Displacement of block
∴ v = Aw cos(wt+∅) (On differentiating) , v : velocity of block
Now ,
Total energy (E) = Kinetic Energy (KE) + Potential Energy (PE)
PE = k [Potential energy of spring]
KE = m
Now,
k=m [from 1]
Substituting the value of k,x and v in the equation of KE and PE
We get,
PE = m
KE = m
∴ TE = m + m
= m
Given , TE = 0.163
∴ 0.163 = m
Substituting m=304g=0.304kg
w = 13.45
We get,
A = 0.07698 m
I believe the answer will be...
A. It has a north and south magnetic pole
The only statement that is true about pseudoscience is letter C. It states that not to use the accepted methods of scientific research and experimentation. It is a belief, a practice or a claim but does not follow the scientific method.
It is commonly perceived as "thickness", or resistance to pouring. Viscosity describes a fluid's internal resistance to flow and may be thought of as a measure of fluid friction. Thus, water is "thin", having a low viscosity, while vegetable oil is "thick" having a high viscosity.
Answer:
(a)7.5 rad/s2
(b)1.83s
(c)0.03 kgm2
(d)At the outer edge
Explanation:
The moments of inertia of the record table can be calculated as:
(a) If he is pulling with a constant linear acceleration of a= 1.2 m/s2, then the constant angular acceleration is
(b)The time it takes for the child to pull a distance of s = 2m given a = 1.2 m/s2
Then the angular speed the turntable would have achieved by that time is
(c) By the law of conservation in angular momentum:
where I1 is the initial moment of the turn table before spaghetti drop, and I2 is after.
(d) For the same force, the child could generate different amount of torque, depending on where he's pressing his thumb. If it's near the the rotational axis, the moment arm is very small, or not at all, making the torque small. If it's at the edge, then the moment arm is large, making greater torque, so less work.