.and anything divided by 0 is 0 - you don't divide when calculating workWork force x distance moved in direction of forceE.gif you push something with a force of 20N and move it 3m, the work done is Fxd 20x3 60J That means you have transferred 60J (it could be to kinetic energy if the object is now moving, or to heat if there is friction, or to potential energy if the object has been raised up)So if the crane doesn't move the car, distance 0And anything times 0 is still 0So no work is done (no energy is transferred to the car or turned to heat do to friction moving the car)_ The mass of the car is is more than 1400kg (weight is more than 14000N)That's all you can say1300N isn't enough to lift itNeither is 14000N.
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Work The change in energy So, if the car isn't moving up or down, then the change in potential energy 0If the car's speed isn't changing, then the change in kinetic energy 0.
A crane is holding a car in the air and is trying to lift it with a force of 14000N, but its is doing no work to the car at all, because the crane isn't successfully moving the car and the car is stationaryWe had to explain why no work was being doneSo the reason why no work is being done is because the distance the crane has moved the car on any given plane is 0, and anything divided by 0 is 0Somehow that is supposed to make sense to me, it doesn't but that isn't what confuses me The magnitude of work is the product of the force times the distance the object is movedThe force and the distance must be in the same directionTo do work, the car must be moved upward Work force distance 14000 N 0 m 0 Newton meter of work You don’t divide by 0, you multiply by 0The crane operator can lock the cable, so car cannot move downThen turn off the craneThe crane is still holding the car in the airIf you saw a car hanging 10 ft above the ground, you would not say that the crane IS doing any workIF you watched the crane as it lifts the car from the ground to this height, you would say that the crane IS doing workWork requires motion! So far, we know that 14,000 N will not lift the carSince we do not know much about this situation, let’s decrease the force to 13,000 N and see if the crane can lift the car! The car still isn't moving and no work is being done IF we knew that any force greater than 14,000 N would cause the car to move upward, the weight of the car must equal 14,000 NWeight mass g 14,000 mass 10 Mass 1400 kg
Its c) 3Aluminium is in Group 3 of the Periodic table, therefore it will have 3 electrons in its outer shell.
