Answer:
we learned that an object that is vibrating is acted upon by a restoring force. The restoring force causes the vibrating object to slow down as it moves away from the equilibrium position and to speed up as it approaches the equilibrium position. It is this restoring force that is responsible for the vibration. So what forces act upon a pendulum bob? And what is the restoring force for a pendulum? There are two dominant forces acting upon a pendulum bob at all times during the course of its motion. There is the force of gravity that acts downward upon the bob. It results from the Earth's mass attracting the mass of the bob. And there is a tension force acting upward and towards the pivot point of the pendulum. The tension force results from the string pulling upon the bob of the pendulum. In our discussion, we will ignore the influence of air resistance - a third force that always opposes the motion of the bob as it swings to and fro. The air resistance force is relatively weak compared to the two dominant forces.
The gravity force is highly predictable; it is always in the same direction (down) and always of the same magnitude - mass*9.8 N/kg. The tension force is considerably less predictable. Both its direction and its magnitude change as the bob swings to and fro. The direction of the tension force is always towards the pivot point. So as the bob swings to the left of its equilibrium position, the tension force is at an angle - directed upwards and to the right. And as the bob swings to the right of its equilibrium position, the tension is directed upwards and to the left. The diagram below depicts the direction of these two forces at five different positions over the course of the pendulum's path.
that's what I know so far
Answer:
Initial Velocity is 4 m/s
Explanation:
What is acceleration?
It is the change in velocity with respect to time, or the rate of change of velocity.
We can write this as:
Where
a is the acceleration
v is velocity
t is time
is "change in"
For this problem , we are given
a = 1.2
t = 10
Putting into formula, we get:
So, the change in velocity is 12 m/s
The change in velocity can also be written as:
It is given Final Velocity = 16, so we put it into formula and find Initial Velocity. Shown Below:
hence,
Initial Velocity is 4 m/s
I am pretty sure it's solids
The total positive charge on a copper penny is <u>1.36×10⁵C.</u>
One gram molecular weight of an element contains Avogadro number of independent entities. The atomic weight of Copper is 63.546.
Therefore 63.546 g of Copper contains 6.023×10²³atoms of copper.Calculate the number of atoms N in 3.1 g of copper in the penny.
The atomic number Z of copper is 29. Atomic number is equal to the number of protons present in the nucleus of the atom. Thus, a copper atom has 29 protons. Each proton has a charge e equal to 1.6×10⁻¹⁹C.
Therefore the total charge Q on the penny is given by,
Substitute 2.938×10²²for N, 29 for Z and 1.6×10⁻¹⁹C for e.
The total positive charge on a copper penny is <u>1.36×10⁵C.</u>
Acceleration due to gravity on that planet is half than that of om earth ~
that is ~
And it's weight is equal to ~
now, As we know ~
here ,
- g = Acceleration due to gravity on that planet = 4.9 m/s²
let find the mass of stone ~
Mass of the stone is 100 kg ~
I hope it helped