WebThe floor of a rising elevator does work on a passenger. A normal force exerted by a stationary solid surface does no work. Was this answer helpful? 0. 0. Similar questions. … WebWork is a measurement of energy, so it may seem odd to think that a work can be negative — but it can! Work is how much energy is done by a force over a distance. Suppose we needed to set up ice hockey goal nets. Initially the nets are standing still with zero velocity at the edge of the ice hockey rink. When you push a net, it will start ...
homework and exercises - How do you tell what forces do …
WebScience; Physics; Physics questions and answers; Which one of the following forces is doing work? O the normal force acting on you as you move upward in an elevator O the tension in the string of a swinging simple pendulum o the frictional force acting on a car as it rounds a bend without slipping Your weight as you slide along a horizontal surface Web10 de abr. de 2015 · The static friction is a force that acts on A so W T = T x a = 0. But when the object slides then the friction force is constant and equal to T = μ N and is is always opposite to the velocity of the body. So then W T = − T s where s is the total space traveled by the body. Share. how to set up a virtual visit
Positive work done by FRICTION? Physics Forums
Web1 de ago. de 2024 · Solution 1. In the elevator example, you are correct. The elevator floor does work on you as you stand in a rising elevator. In the jumping example, the floor is not doing work. After all, it is just a floor, it has nowhere to get the energy from to do work on you. (The floor of the elevator gets it from the motor running the elevator.) Web17 de fev. de 2024 · Symbol of normal force: F. Unit of normal force: Newton or N. Dimensions of normal force: MLT -2. The work done by a force is defined as the force times the displacement. W = F x d. Since the normal force does not displace the object, so the work done is zero. W = FN x 0 = 0. 2. On an Incline or Ramp. Web15 de dez. de 2024 · 1. The proof of magnetic forces do no work is given in Introduction to Electrodynamics by David J. Griffiths like this. Consider a charged particle q moving with … how to set up a virtual private network