Answer what is going on
Explanation
Answer:
The velocity at that time would be . The velocity of this particle is continuously changing.
Explanation:
Differentiate the expression for position with respect to time to find an expression for velocity.
.
Hence, at , velocity would be .
Since velocity changes with time , the velocity of this particle is continuously changing.
Answer:
Explanation:
1) for A+B: a²+b²-2abcos(π-α);
2) for A-B: a²+b²-2abcos(α);
3) according to the condition (A+B):(A-B)=n, then
Complete Question:
Given at a point. What is the force per unit area at this point acting normal to the surface with ? Are there any shear stresses acting on this surface?
Answer:
Force per unit area,
There are shear stresses acting on the surface since
Explanation:
equation of the normal,
Traction vector on n,
To get the Force per unit area acting normal to the surface, find the dot product of the traction vector and the normal.
If the shear stress, , is calculated and it is not equal to zero, this means there are shear stresses.
Since , there are shear stresses acting on the surface.