Answer:
The person is 187[m] farther and 70° south to east.
Explanation:
We can solve this problem by drawing a sketch of the location of the person and the truck, then we will draw the displacement vectors and finally the length of the vector and the direction of the vector will be measured in order to give the correct indication of where the person will have to move.
First we establish an origin of a coordinate system.
We can see in the attached schema that the red vector is the displacement vector from the last point to where the truck is located.
The length of the vector is 187 [m], and the direction is 70 degrees south to East.
Answer:
The specific kinetic energy of a mass is 0.8 kJ/kg
Explanation:
Given that,
Velocity = 40 m/s
Specific kinetic energy is the kinetic energy per unit mass.
We need to calculate the specific kinetic energy
Using formula of specific kinetic energy
Put the value into the formula
We know that,
1 kJ = 1000 J
or, 1J=0.001 KJ
The specific energy is
Hence, The specific kinetic energy of a mass is 0.8 kJ/kg
Answer:
Explanation:
We know that for a capacitor , where <em>Q </em>is the charge of one plate, <em>C</em> the capacitance and <em>V</em> the potential between the plates.
We also know that , since
is the surface charge density and <em>A</em> the area of the plate (both equal in our case).
Putting all together:
Which for our values is:
Where we notice that the S.I. units combination FV/C must not have units (we can verify it directly from their definitions or we notice that is enough to describe an area).