Answer:
Explanation:
Given that:
A cyclist rides 4.0 km due west, then 12.0 km 33° west of north. From this point she rides 9.0 km due east.
Let:
Assuming that:
east is the + x axis and has a unit vector of
north is the +y axis and has a unit vector of
west is the - x axis and has a unit vector of
south is the - y axis and has a unit vector of -
The displacement in a given direction of x can be expressed by the formula:
The displacement in a given direction of y can be expressed by the formula:
The final displacement can be expressed by the relation;
Answer:
i gotta think about this one
Explanation:
Answer:
The expression is Vmem = ΔV - I*Rax
Explanation:
According to the picture, if switch S is closed, the Cmem will be short. If Vcap = 0, the current flows through the capacitor only (not through Rmem), thus Vmem = 0 after closing S.
When C is fully charged, then we have:
Vmem = ΔV - I*Rax
Work or energy spent=force times distance=25N*4m=100Nm
power=energy or work divided by time=100Nm/5s=20Nm/s