Why malleability is a useful property
1 answer:
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Answer:
a. 139.748J
b.3.486m/s
c.zero
Explanation:
a. Given the mass of the child as 23.0kg, rope length is 2.1mand incline is 45°
Potential energy during release is calculated as:
#Find vertical difference of when the swing is at rest (2.1m) and when the child is pulled back.
Find the height when the child is pulled back:
#therefore,vertical difference is 2.1m-1.48m=0.62m
#Hence the potential energy during release is 139.748J
b. From a, above, we have PE=139.748J, M=23.0kg.
At the bottom, all the PE will be transferred into KE. Potential energy is calculated as:
#Hence the velocity at the bottom of the swing is 3.486m/s
c. Work is calculated as the product of force by distance.
From a, b above we have mass as 23.0kg .
-since the distance of the ropes remained constant the change in distance is zero:
Therefore the work in the ropes is 0,zero.
Answer:
a)1.37 s
b)∞ ( Infinite)
Explanation:
Given that
L= 47 cm ( 1 m =100 cm)
L= 0.47 m
a)
On the earth :
Acceleration due to gravity = g
We know that time period of the simple pendulum given as
Here
Now by putting the values
T=1.37 s
b)
Free falling elevator :
When elevator is falling freely then
( This is case of weightless motion)
Therefore
T=∞ (Infinite)
Answer:
The answer is 10.857mJ
Explanation:
The energy stored in this solenoid is given by the below mentioned equation,
where L the inductance of this solenoid is given by the below mentioned equation,
Plugging this into the energy equation you obtain the equation for the total energy stored in the magnetic field of the solenoid, given by,
where is the permeability of free space which equals to
. Plugging all the quantities into the above equation from the data in the question after converting to standard units. of meters instead of centimeters, we get for the energy stored in the coil,