Answer:
The work done by gravity is 
Explanation:
The data given in the question is :
Mass is 
Height from ground is 
As we know , the work done is state function , it depends on initial and final position not on the path followed.
So, work done by gravity = change in potential energy
Work done = Initial potential energy - final potential energy
Insert values from question
Work done = 
Work done = 
So, work done = 
Hence the work done by gravity is 
Answer:
14cm
Explanation:
Mass per gram of the piece of wire;
2g of the wire is found in 1m
Since
100cm = 1m;
So;
100cm of the wire contains 2g of the wire
To provide 0.28g
Since;
2g of wire is made up of 100cm
0.28g of wire will be contained in
= 14cm
14cm of the wire will contain 0.28g
Complete Question
Complete Question is attached below
Answer:

Explanation:
From the question we are told that:
Side length s=1.13m
Left field strength 
Right field strength 
Front field strength 
Back field strength 
Top field strength 
Bottom field strength 
Generally, the equation for Charge flux is mathematically given by

Where
Theta for Right,Left,Front and Back are at an angle 90

Therefore
with respect to Right,Left,Front and Back
Generally, the equation for Charge Flux is mathematically also given by
Where

Therefore



Giving



Answer: 2.61 s
Explanation:
We are given the following data:
is the initial height of the object
is the initial height of the object
In addition, the motion of the object is given by:
(1)
Where:
is the final height of the object
is the time the object is in the air before hitting the ground
Rewritting (1) with the given data:
(2)
Solving the quadratic equation with the quadratic formula
, where
,
,
and choosing the positive value of time:
(3)
(4) This is the time
Complete question:
A solid disk rotates in the horizontal plane at an angular velocity of 0.067 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.18 kg.m2. From above, sand is dropped straight down onto this rotating disk, so that a thin uniform ring of sand is formed at a distance of 0.40 m from the axis. The sand in the ring has a mass of 0.50 kg. After all the sand is in place, what is the angular velocity of the disk?
Answer:
The angular velocity of the disk is 0.0464 rad/s
Explanation:
Given;
initial angular velocity of disk, ωi = 0.067 rad/s
initial moment of inertia of the disk, I₁ = 0.18 kg.m²
radius of sand on the disk, R = 0.40 m
mass of sand, m = 0.50 kg
Initial angular momentum = Final angular momentum

Moment of inertia of sand ring = MR²

Therefore, the angular velocity of the disk is 0.0464 rad/s