In a mechanical problem, power is the time derivative of energy or work. From a rock, to a rocket ship, to a galaxy, everything that moves is discussed in terms of force, distance and time. In physics, a force is an influence that can change the motion of an object.A force can cause an object with mass to change its velocity (e.g. . SURVEY . What is the best estimate of the capacity of a juice box? change in velocity divided by time. What is force multiplied by distance? Youre near the deep end of the pool, and using the handy pressure gauge you always carry, you measure the pressure on the back of your hand as\r\n\r\n![\"image2.png\"](\"https://www.dummies.com/wp-content/uploads/331303.image2.png\")
\r\n\r\nWhat force does the water exert on the back of your hand? She applies the force perpendicular to the arm of the wrench. Okay, you say, getting out your clipboard. Petra Wakefield is a writing professional whose work appears on various websites, focusing primarily on topics about science, fitness and outdoor activities. by 1 square meter. However, because you often have to account for acceleration when you apply a force, you usually write the equation in terms of average power and average speed:
![\"image2.png\"/](\"https://www.dummies.com/wp-content/uploads/331552.image2.png\")
\nHeres an example. Recall what the force exerted per coulomb of unit +ve charge placed at a point represents.. RANK. in this case, "distance" means how far the spring has been moved By entering your email address and clicking the Submit button, you agree to the Terms of Use and Privacy Policy & to receive electronic communications from Dummies.com, which may include marketing promotions, news and updates. How much horsepower is that? 2023 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. Force of gravity equals mass of planet times mass of other times the constant (G) that makes the units work all divided by the distance from one to the other AND the other to one (turns out. Lets put it to the test.
\nYour brothers car has a mass of
\n![\"image3.png\"/](\"https://www.dummies.com/wp-content/uploads/331553.image3.png\")
\nOn the big Physics Test Track on the edge of town, you measure its acceleration as 4.60 meters/second2 over 5.00 seconds when the car started from rest. Weigh the object on the mass balance. The back of your hand has an area of about\r\n\r\n![\"image3.png\"](\"https://www.dummies.com/wp-content/uploads/331304.image3.png\")
\r\n\r\nYou reason that if P = F/A, then the following is true:\r\n\r\nF = PA\r\n\r\nPlugging in the numbers and solving gives you the answer:\r\n\r\n![\"image4.png\"](\"https://www.dummies.com/wp-content/uploads/331305.image4.png\")
\r\n\r\nYikes. Say youre in your neighbors pool, waiting near the bottom until your neighbors give up trying to chase you off and go back into the house. You wouldnt explode, but your lungs could burst if you tried to hold your breath. I demand a recount.. Moment of force = Force x perpendicular distance from the given point to the line of action of the force Moment of force = F x l Torque It is simply the product of the force acting on the body and the perpendicular distance from the given point to the line of action of the force. The back of your hand has an area of about. Say youre in your neighbors pool, waiting near the bottom until your neighbors give up trying to chase you off and go back into the house. You whip out your underwater calculator to find thats about 230 pounds. How much horsepower is that?
You know that
\n![\"image4.png\"/](\"https://www.dummies.com/wp-content/uploads/331554.image4.png\")
\nso all you need to calculate is the average speed and the net applied force. Effective Area (A) Enter the effective surface area which the applied pressure is acting on. a = F net / m = (4.93 x 10-3 N, . In general, the IMA = the resistance force, Fr, divided by the effort force, Fe. He has authored Dummies titles including Physics For Dummies and Physics Essentials For Dummies. Dr. Holzner received his PhD at Cornell.
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