The engine of a 1520-kg automobile has a power rating of 75 kW. Determine the time required to accelerate this car from rest to
1 answer:
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Potential energy is the energy that is possible to be realized, based on position, while the kinetic energy is the energy that is present and due to motion
The location where the potential energy is converted into kinetic energy is the point (2)
Reason:
The mechanical energy, M.E., of the roller coaster, is given as follows;
M.E. = P.E. + K.E.
Where;
P.E. = The potential energy = m·g·h
K.E. = The kinetic energy =
Where;
v = The velocity
h = The height
m = The mass
g = Acceleration due to gravity
∴ M.E. = m·g·h +
The mechanical energy, M.E., is constant, therefore;
When the height, h = 0, we have, the kinetic energy is maximum, given that the mechanical energy is entirely kinetic energy
Therefore;
The locations where potential energy is converted to kinetic energy are lowest locations, where the height, <em>h</em>, is minimum, such as the point (2)
Learn more about potential and kinetic energy here:
Answer:
The unknown force will be 18.116 lb.
Explanation:
Given that,
Three forces act on a flange as shown in figure.
The net force acting on the flange is a minimum.
We need to calculate the unknown force
Using formula of net force
Put the value into the formula
The magnitude of net force,
On differentiating w.r.to F
Negative sign shows the direction of force which is downward.
Hence, The unknown force will be 18.116 lb.
Answer:
Explanation:
Given
Mass of ice
mass of water
Initial Temperature of water
Let T be the Final Temperature of mixture
Latent heat of Fusion
heat required to melt ice completely is
Heat released by water is taken by ice thus