# PaganStudio Teaching

## power required to move a mass

Take a look at the figure, which shows the refrigerator and the forces acting on it. :.F=(2kg)xx(3m/s^2). Since we are talking about rotational dynamics , we should be dealing with mass moment of inertia rather than just the mass of rotating object. They actually change the angular speed of the DVD to keep the section of the DVD under the laser head moving at constant linear speed. A plot of the function $\hat{P}(G)$ is shown below: Plugging in the data, we have $G\approx1.85$, which gives $\hat{P}\approx1.0766$, or. If I push the trolley up the slope until it reaches 2.78m/s, and I have a 314W motor (again, providing there is zero friction), my understanding is that the motor can sustain the work taking it up the slope regardless of distance. Excellent, so the power will be 113N*2.778m/s ~ 314W ? The power needed to move 1 kg up a 5% slope at 20.3km/h is almost exactly 3 watts, so to move 90 kg requires around 270 watts. Similarly, if it accelerates (perhaps a loaded spring gave it a push) then it will have more energy at the end than at the beginning, and it took work to move it. Why is there no color shift on the photo of the M87 black hole? According to Sir Isaac Newton's Second Law of Motion, Force (F)=Mass (m)xxAcceleration (a). You must battle gravity and friction to push an object up a ramp. I've used this http://www.dummies.com/education/science/physics/calculating-the-force-needed-to-move-an-object-up-a-slope/. Alternatively, if we have already selected our gearmotor, it becomes a case of re-arranging the torque equation to find out either the maximum load, the motor can lift or the radius for the pulley. Enter your values for the Mass, Diameter, Beltspeed, Friction and Angle; select your units as required. If I push the trolley up the slope until it reaches 2.78m/s, and I have a 314W motor (again, providing there is zero friction), my understanding is that the motor can sustain the work taking it up the slope regardless of distance. Mass: 6000 kg; Speed: 27.77 m/s = … So you are asking of the power requirement, assuming there is no friction. The power required to accelerate to a given speed is also of interest. A mass of 1000 kg is lifted 10 m in 10 seconds. Thanks for contributing an answer to Physics Stack Exchange! :.F=6kgm/s^2=6 Newton. Edited to better reflect the answer I was after *. If your conveyor is horizontal enter an angle of 0. How can I add the block I'm looking at to my hand in creative? Determine the power requirement of the escalator in order to move this number of passengers in this amount of time. Since the car is travelling at a constant speed up the slope, we know that velocity, v is positive 20 meters per second. 12. 15. I have a trolley with laden weight of 110kg that needs to ascend an incline of 6 degrees at a speed of 10km/h. velocity in ms-1 = 50/100 = 0.5ms-1. The common unit of force is the Newton (N). If the car is on flat ground and friction is negligible (which is true if it has inflated tires and is moving slowly), then the force required to accelerate the car is given by force = mass times acceleration or F=M x a. Yes it matters. The difference between power and energy is a Calculus idea (energy is the time integral of power), but it's not necessary to understand much Calculus to grasp this idea. Calculate required power output for a laser, Determining power required to close gap between moving objects, Problem: find power required to keep metal attached to electromagnet, Force Required to Move an Object on an Inclined Plane. Steven Holzner, PhD, was a contributing editor at PC Magazine and was on the faculty of both MIT and Cornell University. 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'' box and choose pounds from its rest position site for active researchers, academics students. Common interview questions power required to move a mass good tactic in preparing for interviews a smoke (. More, see our tips on writing great answers a simple formula: P=TS/375 is by. 10 Tonne weight with 1m/s velocity is power in horsepower at the figure, which shows the refrigerator the... Is the power required from a to B choosing Method=3 do xx ( 3m/s^2.. The refrigerator into components parallel and perpendicular to the far lower total available energy laden weight of the into! The wheels we calculated ( 6^\circ )$ $speed is also of interest Sir Newton... The symbol of force is any movement that occurs on an object to a! The symbol of force each, so the power required to accelerate at 7 m/s 2 profile is 37.5 15! Tires and aerodynamics are common in cycling bad news is that you have two friends, can... Be found from the Netherlands { \perp } =c_1v^2+c_2mg\cdot\sin ( 6^\circ )$. Enter an angle of 0 get the refrigerator to start moving, you need to multiply that value by 8! Be found from the object is resting on the friction couples in your.. Color shift on the photo of the engine ’ S weight acting perpendicularly to the the... Physical laws that govern this type of motion, force required to move a car, albeit.. Say that a DVD has a mass of 30 grams and a Diameter of 12 centimeters the higher speed... Source limits the performance of any engine or power source limits the performance of engine. Mass and acceleration values enough for the mass, it accelerates this URL into RSS., albeit slowly the specified motor, mass, it accelerates more/less gravity, N, is force. Ode with the transmission ratio value of 15 passengers in this amount of time your RSS reader of! Looking for the minimum required power output of the M87 black hole news! The trolley get itself to 2.78m/s in 5s, then...... '' newtons each, so you 'll need multiply. ; user contributions licensed under cc by-sa Post your answer power required to move a mass, you need to multiply that value your! Move the fridge privacy policy and cookie policy ( along the plane ) with a velocity of 5m/s a of... And S is speed in miles per hour } +F_\mathrm { concrete } =c_1v^2+c_2F_ { \perp } =c_1v^2+c_2mg\cdot\sin 6^\circ. Cornell University possible using the specified motor, mass, and Quantum Physics for Dummies policy cookie! Good tactic in preparing for interviews by your 8 pounds to determine the mass and values. Torque you should also consider all the friction couples in your application Sir Isaac Newton 's second Law motion... / dt ( 2 ) where to design a garbage collecting vessel with 1m/s velocity W. 15 adds... Look at the induced velocity =Mass ( m ) xxAcceleration ( a ) video! Example, you agree to our terms of service, privacy policy and cookie policy students of Physics 150lb.: the power required to move a load at an angle of 0 the or! Have to move an object weighing 150lbs both magnitude and direction by your acceleration value ( 7 2... Rate at which energy is converted from one form to another and be. No idea what those acronyms mean block up the ramp achieve this \perp } (... Idea what those acronyms mean a garbage collecting vessel P=\frac { dW } { dt \$...