Answer:
N₂ = 503.8 N
Explanation:
given,
mass of bottom block = 37 Kg
mass of middle block = 18 Kg
mass of the top block = 16 Kg
force acting on the top block = 170 N
force on the block at top
N₁ be the normal force from block at middle
now,
N₁ = 170 + m g
N₁ = 170 + 16 x 9.8
now, force on block at middle
N₂ be the normal force exerted by the bottom block
N₂ = N₁ + m₂ g
N₂ = 326.8 + 18 x 9.8
N₂ = 503.8 N
hence, normal force by bottom block is equal to N₂ = 503.8 N
C. 7, 5 solar and 2 lunar eclipses or 2 solar and 5 lunar eclipses
The substance R-410A is a trademark symbol given to a refrigerant also known as Freon™. Since this is a synthetic substance, known thermophysical conditions are already tabulates as shown in the picture. At a temperature of 100°F, the pressure of the saturated liquid R-410A would be
<em>332.38 psia</em>.
Answer:
The data that we have is:
Initial height = 2m
Initial vertical speed: As the sister is only pushed, we can assume that we do not have initial speed in the vertical axis.
Then at the beginning, we only have potential energy, that (using the water as the zero in our axis) can be written as:
U = m*g*h
where m is the mass of your sister, g is the gravitational acceleration, and h is the initial height:
h = 2m
g = 9.8m/s^2
Now, when your sister is about to touch the water, all the potential energy has be transformed into kinetic energy:
K = (m/2)*v^2
Then we have, at that moment:
K = U
(m/2)*v^2 = m*g*h
We want to solve this for v, that is the velocity.
v = √(2*g*h) = √(2*9.8m/s^2*2m) = 6.26 m/s
So the speed at which your sister hits the water is 6.26 m/s
The acceleration should be a gain of 2 km/h per second