Learning 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.
Answers: 3
Physics, 22.06.2019 05:00
At time t=0, a particle is located at the point (3,6,9). it travels in a straight line to the point (5,2,7), has speed 8 at (3,6,9) and constant acceleration 2i−4j−2k. find an equation for the position vector of the particle.
Answers: 2
Physics, 22.06.2019 14:10
What is the weight of a 8-kg substance in n, kn, kg·m/s2, kgf, lbm·ft/s2, and lbf?
Answers: 2
Physics, 22.06.2019 16:50
Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?
Answers: 2
Physics, 22.06.2019 17:00
If a negatively charged particle is placed at rest in an electric potential field that increases in the positive x-direction, what will the particle do? a. accelerate in the positive x-direction b. remain at rest c. accelerate in the negative x-direction
Answers: 3
Learning goal: to be able to calculate work done by a constant force directed at different angles r...
Mathematics, 02.01.2020 02:31
Mathematics, 02.01.2020 02:31
Biology, 02.01.2020 02:31
Arts, 02.01.2020 02:31
History, 02.01.2020 02:31
History, 02.01.2020 02:31
English, 02.01.2020 02:31
Mathematics, 02.01.2020 02:31
Arts, 02.01.2020 02:31