Answer:
0.23 s
Explanation:
First of all, let's find the time constant of the circuit:
where
is the resistance
is the capacitance
Substituting,
The charge on a charging capacitor is given by
(1)
where
is the full charge
we want to find the time t at which the capacitor reaches 90% of the full charge, so the time t at which
Substituting this into eq.(1) we find
Answer:
Explanation:
The missing image of the figure slide is attached in below.
However, from the model, it is obvious that it is in equilibrium.
As a result, the relation of the force and the torque is said to be zero.
i.e.
and
From the image, expressing the forces through the y-axis, we have:
Also, let the force be the pivot and computing the torque to determine
:
Then:
For the force equation:
where:
Then:
Answer:
Explanation:
Given
height from which ball is dropped
and it rises to a height of
A person caught the ball in mid-way i.e. at a height of from pavement
time taken to reach the bottom is given by
where y=displacement
u=initial velocity
a=acceleration
t=time
here initial velocity is zero i.e.
Similarly to reach of height time taken is
The ball is caught in mid-way i.e. ball travel a distance of
time taken is
total time taken
total time =3.429 s