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21. (8 pts) An object is dropped from rest...
An object is dropped from rest from a height 7 × 10^6 m above the surface...
An object is dropped from rest from a height 7 × 10^6 m above the surface of the earth. If there is no air resistance, what is its speed when it strikes the earth? The acceleration of gravity is 9.81 m/s2 and the radius of the Earth is 6.37 × 10^6 m. Answer in units of km/s.
2. An object of 5 kg is released from rest 1000 meters above the ground level...
2. An object of 5 kg is released from rest 1000 meters above the ground level and allowed to fall under the influence of gravity. Assuming that the force due to air resistance is proportional to the velocity of the object with proportionality constant k = 50 kg/sec determine the formula for the velocity of the object 3. A rocket having an initial mass mo kg is launched vertically from the surface of the Earth. The rocket expels gas at...
QUESTION 10 A rocket of mass 2000 kg is launched straight upwards from the Earth's surface...
QUESTION 10 A rocket of mass 2000 kg is launched straight upwards from the Earth's surface to an altitude of 10,000 km. How fast was the launch speed? Radius of the Earth is 6.37x10 m. Mass of the Earth is 5.97x10 kg. The Universal gravitational constant is 6.67x10" N /kg a 442.7 m/s Ob. 1390 m/s c.4119 m/s d. 8739 m/s Oe. 10841 m/s
Two identical objects are dropped from rest at the same time. Object A is dropped from...
Two identical objects are dropped from rest at the same time. Object A is dropped from twice the height of object B. If there is no air resistance, which statement is true? None of the answers given is true. Both objects hit the ground at the same time. Object A takes twice the time to fall as object B. Object A takes four times the time to fall as object B.
An 80 kg object is dropped from rest from a height of 25 meters above the...
An 80 kg object is dropped from rest from a height of 25 meters above the ground. Use the concept of energy conservation to find its speed when it is 10 meters above the ground.
Derive an expression for the energy needed to launch an object from the surface of Earth...
Derive an expression for the energy needed to launch an object from the surface of Earth to a height h above the surface. Ignoring Earth's rotation, how much energy is needed to get the same object into orbit at height h? Express your answer in terms of some or all of the variables h, mass of the object m, mass of Earth mE, its radius RE, and gravitational constant G.
Derive an expression for the energy needed to launch an object from the surface of Earth...
Derive an expression for the energy needed to launch an object from the surface of Earth to a height h above the surface. Ignoring Earth's rotation, how much energy is needed to get the same object into orbit at height h? Express your answer in terms of some or all of the variables h, mass of the object m, mass of Earth mE, its radius RE, and gravitational constant G.
Canvas D | Question 23 4 pts re package is dropped from rest from a helicopter...
Canvas D | Question 23 4 pts re package is dropped from rest from a helicopter hovering 59 m above the ground. What is the speed of the package just before it reaches the ground? Neglect air resistance. D Question 24 5 pts A baseball of mass 1.38 kg initially at rest, is struck by a bat so that it acquires a speed 10 m/s. Determine the duration of the collision between the bat and the ball (in seconds). if...
Canvas D | Question 23 4 pts re package is dropped from rest from a helicopter hovering 59 m abov...
Canvas D | Question 23 4 pts re package is dropped from rest from a helicopter hovering 59 m above the ground. What is the speed of the package just before it reaches the ground? Neglect air resistance. D Question 24 5 pts A baseball of mass 1.38 kg initially at rest, is struck by a bat so that it acquires a speed 10 m/s. Determine the duration of the collision between the bat and the ball (in seconds). if...
P3. A rocket of mass -1.20x10'kg is launched vertically upward from point A on the earth's surface with an initial speed v, 7.00km/s a. (12) Calculate the maximum height H of point B above th...
P3. A rocket of mass -1.20x10'kg is launched vertically upward from point A on the earth's surface with an initial speed v, 7.00km/s a. (12) Calculate the maximum height H of point B above the earth's surface at which the rocket will momentarily come to rest, before it starts falling back to the earth Hint: Use conservation of energy. b. (4) Determine the gravitational acceleration a at point B. c. (9) Calculate the total mechanical energy E of the rocket....
2. An object of 5 kg is released from rest 1000 meters above the ground level and allowed to fall under the influence of gravity. Assuming that the force due to air resistance is proportional to the velocity of the object with proportionality constant k = 50 kg/sec determine the formula for the velocity of the object 3. A rocket having an initial mass mo kg is launched vertically from the surface of the Earth. The rocket expels gas at...
QUESTION 10 A rocket of mass 2000 kg is launched straight upwards from the Earth's surface to an altitude of 10,000 km. How fast was the launch speed? Radius of the Earth is 6.37x10 m. Mass of the Earth is 5.97x10 kg. The Universal gravitational constant is 6.67x10" N /kg a 442.7 m/s Ob. 1390 m/s c.4119 m/s d. 8739 m/s Oe. 10841 m/s
Canvas D | Question 23 4 pts re package is dropped from rest from a helicopter hovering 59 m above the ground. What is the speed of the package just before it reaches the ground? Neglect air resistance. D Question 24 5 pts A baseball of mass 1.38 kg initially at rest, is struck by a bat so that it acquires a speed 10 m/s. Determine the duration of the collision between the bat and the ball (in seconds). if...
Canvas D | Question 23 4 pts re package is dropped from rest from a helicopter hovering 59 m above the ground. What is the speed of the package just before it reaches the ground? Neglect air resistance. D Question 24 5 pts A baseball of mass 1.38 kg initially at rest, is struck by a bat so that it acquires a speed 10 m/s. Determine the duration of the collision between the bat and the ball (in seconds). if...
P3. A rocket of mass -1.20x10'kg is launched vertically upward from point A on the earth's surface with an initial speed v, 7.00km/s a. (12) Calculate the maximum height H of point B above the earth's surface at which the rocket will momentarily come to rest, before it starts falling back to the earth Hint: Use conservation of energy. b. (4) Determine the gravitational acceleration a at point B. c. (9) Calculate the total mechanical energy E of the rocket....
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