Answer:
6621.6 Joule
0.46525
Explanation:
F = Force = 356 N
s = Displacement = 18.6 m
m = Mass of block = 78 kg
Work done
The work done by the horizontal force is 6621.6 Joule
The coefficient of friction between the block and the rough surface is 0.46525
Answer:
t=2.348s
Explanation:
First we need to calculate the Potential Energy of a Tesla to reach the 100km/h
So we know that,
Here we can to calculate the time through,
Slope formula : y2 - y1 / x2 - x1
The coordinates are ( 66 , 39) and ( 12 , 83)
83 - 39 / 12 - 66
44 / - 54
slope = - 0 . 81 or - 22/27
Answer:
1.) 10.61 A
2.) 0.27 A
Explanation:
Given that a sinusoidal A.C has a maximum value of 15A.
1) What are its r.m.s values?
ii) If the time is recorded from the instant the current is zero and is becoming
positive, what is the instantaneous value of the current after 1/300s, given the
frequency is 50 Hz.
Solution.
1.)
The r.m.s current = peak current/root 2
The r.m.s current = 0.7071 × 15
The r.m.s current = 10.61 A
2.)
Given that
Time = 1/300 s
Frequency = 50 Hz
Instantaneous current can be calculated by using the formula
I = I sin wt
Where w = 2πf
Instantaneous current = 15( sin 2πft)
I = 15 × sin ( 2 × 3.143 × 50 × 1/300 )
I = 15 × sin ( 1.047 )
I = 15 × 0.01827
I = 0.27 A
Therefore, the instantaneous current is 0.27A
