Work-energy principle question help please?
You throw a 11.0 N rock into the air from ground level and observe that, when it is 15.0 m high, it is traveling upward at 23.0 m/s. a) Use the work-energy principle to find the rock's speed just as it left the ground. b) Use the work-energy principle to find the maximum height the rock will reach.
Energy principle physics questions help please?
A pitcher can throw a baseball at about 90 miles/hour (about 39.6 m/s). What is the ratio of the kinetic energy to the rest energy mc2? (Can you use K approximately equals 1/2mv2?) It is not very difficult to accelerate an electron to a speed that is 98.5% of the speed of light, because it has such a very small mass. What is the ratio of the kinetic energy K to the rest energy mc2 in this case? In the definition of what we mean by kinetic energy (K = E - mc2), you must use the full relativistic formula for E, because v/c is not small compared to 1.
A.P. Physics - Work-Energy Principle ?
5) Force * time = change in momentum where Force is the avg force applied and time is the time in which it is applied, so Force * time = m v = (0.145) (35) where the final velocity is zero. If the distance traveled is 0.35 m, then the time it takes to stop the ball is d = 1/2 a t^2 or 1/2 (V/t) t^2 = 1/2 V t where the acceleration is just a = V / t (final velocity = 0, sign doesn't matter) t = 2 d / V and, then, the force is Force * time = m v = (0.145) (35) Force = m V / (2d / V) = m V^2 / (2d) you have all the data, use the calculator. 6) In this problem. The whole work becomes potential energy and thus W = mg h so h = W / mg = 85 / ((1.55)(9.8)) and that's all.
Momentum principle/energy principle problem question...HELP~!?
You will need to use the Momentum Principle to do the first part of this problem, and the Energy Principle to do the second part. A satellite of mass 4000 kg orbits the Earth in a circular orbit of radius of 9.2 106 m (this is above the Earth's atmosphere).The mass of the Earth is 6.0 1024 kg. What is the speed of the satellite? v = ? m/s What is the minimum amount of energy required to move the satellite from this orbit to a location very far away from the Earth? energy = ? J help would be greatly appreciated...THANKS!
Physics Problem Energy Principle?
In certain cases, using both the momentum principle and energy principle to analyze a system is useful, as they each can reveal different information. You will use the both momentum principle and the energy principle in this problem. A satellite of mass 5500 kg orbits the Earth in a circular orbit of radius of 8.5x10^6 m (this is above the Earth's atmosphere).The mass of the Earth is 6.0x10^24 kg. What is the magnitude of the gravitational force on the satellite due to the earth? F = 30465.05 N Using the momentum principle, find the speed of the satellite in orbit. v = 6861.65 m/s ______________________________________... I CAN'T GET THIS ONE :( Using the energy principle, find the minimum amount of work needed to move the satellite from this orbit to a location very far away from the Earth. (You can think of this energy as being supplied by work due to something outside of the system of the Earth and the satellite.) work= ? (J)
Work - energy Principle physics problem?
a) i = initial f = final KE = kinetic energy = 0.5mv^2 PE = potential energy = mgh m = 55kg...h = 8m KEi + PEi = KEf + PEf 0 + mgh = 0.5mv^2 + 0 you should find v = 12.522 m/s b) What is her energy when she reaches the net? 0.5(55kg)(12.522m/s)^2 = 4312 J Work = (Average Force) x distance The net was depressed 1.2m before she was stopped so you should find the average force to be 3593 N.
Physics Problem - Energy & Momentum Principle?
In certain cases, using both the momentum principle and energy principle to analyze a system is useful, as they each can reveal different information. You will use the both momentum principle and the energy principle in this problem. A satellite of mass 3500 kg orbits the Earth in a circular orbit of radius of 7.4 106 m (this is above the Earth's atmosphere).The mass of the Earth is 6.0 1024 kg. What is the magnitude of the gravitational force on the satellite due to the earth? F = 25693.937 N Using the momentum principle, find the speed of the satellite in orbit. (HINT: Think about the components of parallel and perpendicular to .) v = 7370.5 m/s Using the energy principle, find the minimum amount of work needed to move the satellite from this orbit to a location very far away from the Earth. (You can think of this energy as being supplied by work due to something outside of the system of the Earth and the satellite.) work = J The last part is where I'm having problems.
What is the principle of conservation of energy?
Energy cannot be crated or destroyed, it just transform from one form into another.Because energy is the movement state of mass, so you can simply say the movement of mass cannot be created or destroyed. The movement state of mass just change from one form to another. therefore, the total movements (which is the total energy) in the universe is constant.
Question in Conservation of Energy Principle Please :(?
No that does not violate the conservation of energy principle. Going downhill the force of gravity is turning potential energy into kinetic energy.
How to find kinetic energy of the air from the energy principle?
A coffee filter of mass 1.5 grams dropped from a height of 3 m reaches the ground with a speed of 0.6 m/s. How much kinetic energy Kair did the air molecules gain from the falling coffee filter? Start from the Energy Principle, and choose as the system the coffee filter, the Earth, and the air. ________J