Answer: a) T= 7.95kip.in b) T'= 6.38kip.in c) a= 1°
Explanation:
a) ta = allowable shear stress= 12ksi
Using torsion formula
tm= ta= Tc/J tm = Maximum shear stress
12= T(0.75)/(π/2)(0.75^4). radius= d/2 = 1.5/2 = 0.75in
T= 12(π/2)(0.75^3)= 7.95kip.in
b) using torsion formula
tm= ta= T'c/J radius 2= d/2= 1.0/2 = 0.50in
12= T'(0.75)/(π/2)(0.75^4 - 0.5^4)
T'= 6.38 kpi.in
c) angle of twist = a = TL/JG L= 1ft= 12in
a = 6.38 × 12/(π/2)(0.75^4 -0.50^4)(11)(10^3)
a = 0.01745 rad = 1°
Answer:
<h3>The answer is 3.0 m/s²</h3>
Explanation:
The acceleration of an object given it's velocity and time taken can be found by using the formula
where
a is the acceleration
v is the velocity
t is the time
From the question
v = 12 m/s
t = 4 s
We have
We have the final answer as
<h3>3.0 m/s²</h3>
Hope this helps you
the answer would be the last one because kinetic energy is something in motion.
hope it helps.
A ball falling through the air has a mass, a density, a volume...it is facing air resistance and is being acted on by gravity...it is accelerating and gaining velocity...and it is increasing in kinetic energy.
I suppose out of all those the biggest thing the ball has in this case is ENERGY. There are two main types to focus on...
Kinetic Energy - The further the ball fall the more KE it has...until terminal velocity is reach, then KE would become constant.
Potential Energy - Conversely to that of KE, the further the ball falls the less PE it will have.
<em>Heat/Thermal Energy is technically also present due to the friction from the air resistance, but the transfer of energy between the air and ball is quite complex and not necessary important for basic physics.
</em>
The question itself seem kind of vague and open ended, but I could just be viewing it the wrong way.
Comment if you need more help!
Answer:
Cause its scalar quantity
Explanation:
since speed does not take directions into consideration, it is considered to be a scalar quantity. On the other hand, the velocity of an object does not take into account direction, thus making it a vector quantity.
