Earning goal: to be able to calculate work done by a constant force directed at different angles relative to displacement
if an object undergoes displacement while being acted upon by a force (or several forces), it is said that work is being done on the object. if the object is moving in a straight line and the displacement and the force are known, the work done by the force can be calculated as
w= f*s=/f/ /s/ cosθ
,
where w is the work done by force f on the object that undergoes displacement s directed at angle θ relative to f .
note that depending on the value of cosθ, the work done can be positive, negative, or zero.
in this problem, you will practice calculating work done on an object moving in a straight line. the first series of questions is related to the accompanying figure. (intro 1 figure)
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question= find the work w done by the 30-newton force.
use two significant figures in your answer. express your answer in joules.
Answers: 1
Physics, 21.06.2019 23:30, supernova69
In which of the following cases is work being done on an object? question 2 options: pulling a trailer up a hill carrying a box down a corridor suspending a heavy weight with a strong chain pushing against a locked door
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Physics, 22.06.2019 12:00, JvGaming2001
In a set amount of time, a battery supplies 25j of energy to an electric circuit that includes two different loads. one of the loads produces 10 j of heat energy during this time interval. how much heat energy is produced by the second load in this time? explain your answer
Answers: 3
Physics, 22.06.2019 17:00, nathanb126
The force it would take to accelerate an 900-kg car at the rate of 6m/s2
Answers: 1
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