force acting along the path. To express this concept mathematically, the workWis equal to the forceftimes the distanced, orW=fd. If the force is being exerted at an angle θ to the displacement, the work done isW=fdcos θ. Work done on a body is accomplished not only by a ...
Just as the plan for the year should be made in the spring, the plan for a day should be made in the morning. Early rising gives us enough time to get ready for our work, such as to wash our hands and eat our breakfast. So the popular saying says, “Early to bed and early to...
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When you have work done by constant forces, you can always calculate them by using fdcosθ. But when you have variable forces like the spring force here, then we're going to have to use the average of the force instead. So we're going to use fdcosθ, but we're going to have to...
A 50-kg crate is pulled 40 m with a force of 100 N at an angle of 37o . The floor is rough and exerts a frictional force of 50 N. Determine the work done on the crate by each force and the net work done on the crate. (1200 J)F p F fr F N mg q Lab Comments •...
The previous step was just to explain how this formula is obtained. To solve for the work done, we will need to evaluate this equation at 0.6m and 0.3m and find the difference between those two points. Because the force that is stretching the spring must be acting i...
Formulae for kinetic energy Let a body of mass m moving with speed v be brought to rest with uniform deceleration by a constant force F over a distance s. Using Equation 1.4 v 2 = u 2 + 2as 0 = u 2 + 2as s= And work done is given by v2 2a work done = force × distance...
1. How much work is done by the gravitational force when a Hint: The force and the displacement are both 265-kg object falls 2.80 m? downwards, so the angle between them is 0o .2. A 65.0-kg physics student climbs a flight of stairs 20.0 m high. Hint: The minim...
Work done by variable force. Conservative and non-conservative forces. Power definition and relation between work and power. Kinetic energy and linear momentum relation. Work energy theorem. Potential energy of a spring. Mechanical energy and its conservation. Collision and its types. What is Work?
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