While waiting for his Mom to come out of the hairdresser's, Sean accidentally puts the car in gear and it begins to roll forward
1 answer:
The distance travelled by the car is 85 m
Explanation:
The car in this problem here is travelling by uniform motion (so, at constant velocity and constant speed). Therefore, the distance covered by the car after a time t is given by:
where
d is the distance covered
v is the speed
t is the time
For the car in this problem we have
v = 34 m/s
t = 2.5 s
Substituting into the formula, we find
So, the car has travelled for 85 m.
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Answer:
The electric field at x = 3L is 166.67 N/C
Solution:
As per the question:
The uniform line charge density on the x-axis for x, 0< x< L is
Total charge, Q = 7 nC =
At x = 2L,
Electric field,
Coulomb constant, K =
Now, we know that:
Also the line charge density:
Thus
Q =
Now, for small element:
Integrating both the sides from x = L to x = 2L
Similarly,
For the field in between the range 2L< x < 3L:
Now,
If at x = 2L,
Then at x = 3L: