Complete Question
The complete question is shown on the first uploaded image
Answer:
The value of the true strain at the onset of the necking is proved as,
Explanation:
From the question we see that necking begins when
Now we are told that
So substituting this into equation 1
But we are told in the question that So,
Dividing both sides with
We have
You need the triangle to help work it out.
Force (pressing force) = Pressure x Area.
1. Force/ Area - 10/2 = 5N/m2
2. (Same as Q1) 70/0.2 = 350N/m2
3. (Same as Q1) 300/0.01 = 30000N/m2
4. Force/pressure - 500/20 = 25m
5. Pressure x Area - 15000 x 0.003 = 4.5N
Answer:
466.956 J
Explanation:
potential energy = mass x gravitational field(9.81) x height
Answer:
Triples
Explanation:
Kinetic energy =1/2 mv^2 + 1/2 Iw^2
v= linear velocity
w= angular velocity
I= moment of inertia of object
I = k mr^2 where k is a constant for a particular shaped object
v = rw
w=v/r
Rotational Kinetic energy = 1/2 k m× (v/r)^2 × r^2
Total Kinetic energy = translational Kinetic energy + rotational Kinetic energy
KE = 1/2 (1+k) mv^2
Centripetal acceleration = mv^2/r
When KE is tripled, because 1/2(1+k) is a constant for a particular object, mv^2 part gets tripled. r doesn't appear in the equation of total Kinetic energy. So tripling Kinetic energy doesn't affect r. Therefore centripetal acceleration also gets tripled.
Answer:
The period of a wave is the time for a particle on a medium to make one complete vibrational cycle. Period, being a time, is measured in units of time such as seconds, hours, days or years. The period of orbit for the Earth around the Sun is approximately 365 days; it takes 365 days for the Earth to complete a cycle.