An air-track cart with mass m1=0.28kg and initial speed v0=0.75m/s collides with and sticks to a second cart that is at rest ini
1 answer:
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Answer:
the normal stress induced by the concrete post
the normal stress induced by the steel
Explanation:
Given that:
Modulus for elasticity for concrete post =
psi
Thermal coefficient for concrete post =
Modulus for elasticity of steel bar =
Thermal coefficient of steel bar =
Change in temperature ΔT = 80°F
Diameter of the steel rood = 7/8-in
Area of the steel rod =
=
= 3.61 in²
Area of concrete parts = (10)(10) -
= (100 - 3.61) in²
= 96.39 in²
The total strain developed in the concrete post can be expressed as:
=
=
=
=
P = 6482.98 lb
Since, the normal stress in concrete is induced as a result of temperature rise; we have the expression :
Thus, the normal stress induced by the concrete post
Also; the normal stress in the steel bars induced as a result of temperature rise is as follows:
Thus, the normal stress induced by the steel
Answer:
EMF induced in the loop is 9.4 V
Explanation:
As we know that initial magnetic flux of the loop is given as
As soon as the area of the loop becomes zero the final magnetic flux of the loop is ZERO
Now as per faraday's law of electromagnetic induction the EMF is induced due to rate of change in magnetic flux
so we will have
so we will have