Answer:
-9.4 kg m/s
Explanation:
Change in momentum = final momentum − initial momentum
Δp = p − p₀
Δp = -4.3 kg m/s − 5.1 kg m/s
Δp = -9.4 kg m/s
Impulse = change in momentum
J = Δp
J = -9.4 kg m/s
Answer:
Option (B)
Explanation:
According to Hubble's law, the distance from the earth to the distant galaxies is directly proportional to their recessional velocity (redshift). This means that the more is the distance between the earth and a galaxy, the faster the galaxy is moving away from the earth.
Recessional velocity normally refers to the speed or velocity at which any astronomical body such as a planet, asteroid, star or galaxy moves away from a reference point, such as from earth.
Thus, the correct answer is option (B).
In an inelastic collision, the kinetic energy that is lost can be seen from something such as a car crash. Thermal energy will be significant, in addition to sound energy.
The kinetic energy transforms because of the force exerted on the objects leading to friction and vibration.
Explanation:
In terms of heat, we can say the dropped ball gained more heat as the potential energy changes to kinetic energy.
Thermal energy is a form of kinetic energy formed as a result of the movement of the particles of a medium.
As the ball falls through the height, it collides with the ground frictional heating between air and the ball, and that of the ball and the surface causes the change in temperature after the collision.
In terms of heat, the ball has transformed kinetic energy into frictional heating after collision causing an increase in temperature after collision.
Potential energy to kinetic energy to heat energy
learn more:
Thermal energy brainly.com/question/914750
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Answer:
Part a)
Part b)
Part c)
Part d)
Part e)
Explanation:
Part a)
As we know that speed of the lens is 1.40 m/s
radius of the path is R = 2.60 cm
so angular speed is
Part b)
radius of the outer path is R = 5.70 cm
so angular speed is
Part c)
Average angular acceleration is rate of change in angular speed
so it is given as
Part d)
For constant angular acceleration the angular displacement is given as
Part e)
Total length of the track is given as
