(a) How much time would it take to raise a 1,200kg car 2m? (b) If it is replaced with a 2,000W motor, how long would it take?
I definitely have a point in physics, so with a bit of luck i comprehend some ingredient. think of of of physics form algebra as only algebra the placement the symbols have incredibly meaning. don't be hectic of drawing diagrams to get the connection (a constraining equation) from the geometry. This many circumstances works right for rope form subjects yet diverse too. yet fairly, the massive ingredient is to think of of of physics as algebra the placement the symbols have incredibly values. F = ma is incredibly comparable to y = mx + b the placement b = 0 in case you draw them on a graph you will see it fairly is an identical. inspite of in spite of if it rather is likewise the case that F means stress m means mass a means acceleration at an identical time as y is any based variable x is any self sustaining variable m is the slope word that when you plot F vs a the slope of the right this moment line going indoors the direction of the commencing place is the mass of the object. Its fairly all only algebra, the ideas are an identical, yet you're waiting to prefer to concentration on the link from precis algebra to creating algebra the placement the variables have incredibly meaning and then to concentration on how they suited, like the mass being the slope hence.
1000 watts means 1000 joules of work per second. Work is force x displacement in this case, so the work done is 1200g * 2 = about 24000 joules. This means it would take about 24000/1000=24 seconds. For a 2000 watt motor, it would take about 24000/2000 = 12 seconds.
