We have that the block is moving horizontally. Hence, its potential energy due to gravity stays the same. The only change in its mechanical energy is the one due to the change of speed. This reduction of its kinetic energy, due to the conservation of energy, is equal to the work that friction does. We have that at A the kinetic energy is : K=1/2*m*u^2=10*10*10/2=500J. At B, we have that K=1/2*10*16=80J. Sine we have that the initial value is 500, the work from the friction force (opposite to the movement of the object) is 80-500=420J.
Answer: Input work is the work done on a machine as the input force acts through the input distance.Other ways it would be the work done on a body or system, that is, forces that are applied to the body or system. This is in contrast to output work which is a force that is applied by the body or system to something else.Output work is the work done by a machine as the output force acts through the output distance. The machine does to the object to increase the output distance.
Explanation:
Answer:
D
Explanation:
on the left u see it says velocity
Answer:
Part a)
Part b)
Part c)
Part d)
Explanation:
Part a)
As we know that the orbital speed of the satellite is given as
now we will have
now we have
now we have
Part b)
Here force between mars and satellite is the gravitational attraction force which is given as
Part c)
Acceleration of satellite is the ratio of gravitational force and mass of the satellite
Part d)
As we know by III law of kepler
here we know that T2 = 8 T1
so we have
as we know that speed is given as
so we can say since radius is orbit becomes 4 times so the orbital speed must be half
Answer:
a. Relative humidity increases: a decrease in temperature without a change in the amount of water vapor in the atmosphere.
Explanation:
Colder air requires less humidity to saturate compared to warmer air. Therefore, the relative humidity depends on the air temperature. If the temperature drops and the water vapor content remains the same, relative humidity increases. If the temperature increases and the water vapor content remains the same, relative humidity decreases. Additionally, a greater amount of water vapor in the air increases the relative humudity.
