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Find the initial potential and kinetic energy of a 5kg rock that falls from a height...
(a) Taking the potential energy to be zero at infinite separation, find the potential energy of...
(a) Taking the potential energy to be zero at infinite separation, find the potential energy of a 30 kg object at the surface of the Earth. (Use 6.37 ✕ 106 m for the Earth's radius.) ________________J (b) Find the potential energy of the same object at a height above the Earth's surface equal to the Earth's radius. _______________J (c) Find the escape speed for a body projected from this height. __________________km/s
A mass of 5kg is on top of a building of height 10m. Calculate its potential...
A mass of 5kg is on top of a building of height 10m. Calculate its potential energy. The mass then falls at a speed of 8 m/s in 4 sec, find its KE and momentum p. What is the Force and impulse the mass transfers to the ground?
Given the formula of the kinetic energy of a particle m with speed v: KE =...
Given the formula of the kinetic energy of a particle m
with
speed v:
KE = 1⁄2mv2 ,
and the formula of the gravitational potential energy:
PE = -GMEm/R,
where G is gravitational constant and ME and R=6378 km are the
mass and the radius of Earth. Now the particle is shot from Earth
surface to space. Find the minimum required initial speed for this
particle to completely escape the influence of Earth gravity (i.e.
PE=0). Notice that the gravitational...
26.) A mass of 5kg is on top of a building of height 10m. Calculate its...
26.) A mass of 5kg is on top of a building of height 10m. Calculate its potential energy. The mass then falls at a speed of 8 m/s in 4 sec, find its KE and momentum p. What is the Force and impulse the mass transfers to the ground? 27.) For problem 26 above, find the work done by gravity if the mass falls a distance 2 meters. If the mass falls for 11 seconds, what is the energy...
11. A rubber ball is dropped from an initial height h=2m. After each bounce the ball...
11. A rubber ball is dropped from an initial height h=2m. After each bounce the ball returns to 75% of its previous height. What percent of its maximum potential energy, maximum kinetic energy and maximum speed is lost as the result of the first bounce? 12. A 20 kg rock slides across a rough horizontal surface and eventually stops. Initial velocity of the rock is 10m/s, coefficient of kinetic friction is 0.1. What average thermal power is produced as the...
A satellite of mass 210 kg is placed into Earth orbit at a height of 400...
A satellite of mass 210 kg is placed into Earth orbit at a height of 400 km above the surface. (a) Assuming a circular orbit, how long does the satellite take to complete one orbit? 1.54 (b) What is the satellite's speed? 7676 m/s (c) Starting from the satellite on the Earth's surface, what is the minimum energy input necessary to place this satellite in orbit? Ignore alr resistance but include the effect of the planet's daily rotation. The satellite...
26.) A mass of 5kg is on top of a building of height 10m. Calculate its...
26.) A mass of 5kg is on top of a building of height 10m. Calculate its potential energy. The mass then falls at a speed of 8 m/s in 4 sec, find its KE and momentum p. What is the Force and impulse the mass transfers to the ground? 27.) For problem 26 above, find the work done by gravity if the mass falls a distance 2 meters. If the mass falls for 11 seconds, what is the energy expended...
26.) A mass of 5kg is on top of a building of height 10m. Calculate its...
26.) A mass of 5kg is on top of a building of height 10m. Calculate its potential energy. The mass then falls at a speed of 8 m/s in 4 sec, find its KE and momentum p. What is the Force and impulse the mass transfers to the ground? 27.) For problem 26 above, find the work done by gravity if the mass falls a distance 2 meters. If the mass falls for 11 seconds, what is the energy expended...
A 5.52 kg rock is dropped and allowed to fall freely. Find the initial kinetic energy,...
A 5.52 kg rock is dropped and allowed to fall freely. Find the initial kinetic energy, the final kinetic energy, and the change in kinetic energy for the first 2.00 m of fall. Find the initial kinetic energy, the final kinetic energy, and the change in kinetic energy for the second 2.00 m of fall.
A rock is thrown straight vertically upward with an initial velocity of 15 m/s. Ignore energy...
A rock is thrown straight vertically upward with an initial velocity of 15 m/s. Ignore energy lost to air friction. The rock will rise to a maximum height of The velocity of the rock at half that maximum height is A Hooke's law spring is compressed 12 cm from equilibrium and the potential energy stored is 3.6 J. The spring constant in this case is The spring is then used to launch a mass of 50 gram along a frictionless...
Given the formula of the kinetic energy of a particle m
with
speed v:
KE = 1⁄2mv2 ,
and the formula of the gravitational potential energy:
PE = -GMEm/R,
where G is gravitational constant and ME and R=6378 km are the
mass and the radius of Earth. Now the particle is shot from Earth
surface to space. Find the minimum required initial speed for this
particle to completely escape the influence of Earth gravity (i.e.
PE=0). Notice that the gravitational...
11. A rubber ball is dropped from an initial height h=2m. After each bounce the ball returns to 75% of its previous height. What percent of its maximum potential energy, maximum kinetic energy and maximum speed is lost as the result of the first bounce? 12. A 20 kg rock slides across a rough horizontal surface and eventually stops. Initial velocity of the rock is 10m/s, coefficient of kinetic friction is 0.1. What average thermal power is produced as the...
A satellite of mass 210 kg is placed into Earth orbit at a height of 400 km above the surface. (a) Assuming a circular orbit, how long does the satellite take to complete one orbit? 1.54 (b) What is the satellite's speed? 7676 m/s (c) Starting from the satellite on the Earth's surface, what is the minimum energy input necessary to place this satellite in orbit? Ignore alr resistance but include the effect of the planet's daily rotation. The satellite...
26.) A mass of 5kg is on top of a building of height 10m. Calculate its potential energy. The mass then falls at a speed of 8 m/s in 4 sec, find its KE and momentum p. What is the Force and impulse the mass transfers to the ground? 27.) For problem 26 above, find the work done by gravity if the mass falls a distance 2 meters. If the mass falls for 11 seconds, what is the energy expended...
A rock is thrown straight vertically upward with an initial velocity of 15 m/s. Ignore energy lost to air friction. The rock will rise to a maximum height of The velocity of the rock at half that maximum height is A Hooke's law spring is compressed 12 cm from equilibrium and the potential energy stored is 3.6 J. The spring constant in this case is The spring is then used to launch a mass of 50 gram along a frictionless...
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