A bag is gently pushed off the top of a wall at A and swings in a vertical plane at the end of a rope of length l. Determine the
angle θ for which the rope will break, knowing that it can withstand a maximum tension equal to twice the weight of the bag.
1 answer:
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Answer:
Explanation:
Capacitance C is given by
A= area of capacitor cross section
d= distance
therefore,
A_1= πR^2
d_1= d
A_= π(2R)^2
d_2 = 2d
threfore
and
also we know that E= V/d
⇒
⇒
= A_1/A_2= =4
therefore,
Answer:
Explanation:
As we know that the magnetic field near the center of solenoid is given as
now we know that initially the length of the solenoid is L = 18 cm and N number of turns are wounded on it
So the magnetic field at the center of the solenoid is 2 mT
now we pulled the coils apart and the length of solenoid is increased as L = 21 cm
so we have
now plug in all values in it
The formula for kinetic energy is, 
where m is mass and v is velocity.
Let's plug the given values in the formula.
It's kinetic energy is 64 Joules.
where m is mass and v is velocity.
Let's plug the given values in the formula.
It's kinetic energy is 64 Joules.