Answer:
Explanation:
It is given that,
Mass of puck 1,
Mass of puck 2,
Initial speed of puck 1,
Initial speed of puck 2,
After the collision, the speed of puck 1,
Let is the final velocity (in m/s) of puck 2 after the collision. Using the conservation of momentum as :
So, the final velocity of the puck 2 after the collision is 24 m/s. Hence, this is the required solution.
I mean i guess its the metric system?
Your answer should be B.) 10
The atomic mass of an element is the sum of the element's protons and neutrons. The atomic number of an element is equal to its number of protons. To find the amount of neutrons in an atom, subtract the atomic number from the atomic mass. 19 - 9 = 10.
Hope this helps!
A planetary nebula is more common to occur than a supernova. It actually is a nebula, meaning mist or cloud but was called planetary nebulae by others because it looked like a planet.
Supernova is a not a usual event to take place.
Answer:
The correct option is C: the normal force of gravity on each foot is equal to 1/2 the force of gravity on the person.
Explanation:
Since the feet are equidistant from each other, the total torque is zero:
And the total forces acting on the feet are also equal to zero:
Hence, the normal force on the feet are:
Where:
W: is the weight force
N₁: is the normal force of foot 1
N₂: is the normal force of foot 2
Since the normal force of each foot is the same, we have that N₁ = N₂ so:
(1)
From the result of equation (1), we have that the normal force on each foot is equal to 1/2 the force of gravity on the person.
Therefore, the correct option is C: the normal force on each foot is equal to 1/2 the force of gravity on the person.
I hope it helps you!