Answer:
J
Explanation:
= length of the rope connected = 13.4 m
= Angle made by the rope with the vertical = 72.4°
= height gained by the batman above the reference point
Height gained by the batman above the reference point is given as
= mass of batman = 89.5 kg
= acceleration due to gravity = 9.8 ms⁻²
Work done against gravity is same as the gravitational potential energy gained by batman and is given as
Inserting the above values
J
Answer:
the answer is a)5.82s
Explanation:
Hello!
The first thing we must understand to solve this exercise is that a capacitor has the following characteristic function
where
Vo=initial voltage
V=voltage in an instant of time
t=time
R=resistance=4000Ω
C=capacitance=2.1-mF=0.0021F
we must consider that the final voltage is half of the initial voltage so we deduce the following equation
V=Vo/2
Now we replace in the initial equation, and start an algebraic process to find t
finally with the equation ready, we use the resistance and capacitance values to find the time value
the answer is a)5.82s