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How much work is done when a force is applied to an object that does not move?
No work is done when a force is applied to an object that does not move because work is defined as the product of force and displacement in the direction of the force. If there is no displacement, then no work is done.
Does an object have to move in order for work to be done?
Work = force x distance. If distance = 0, work = 0 because force x 0 = 0.
What is The work done holding a 50 kg object at a height of 2 m above the floor for 10 seconds?
The work done in holding the object at a constant height is zero, as there is no change in the object's position. Work is calculated as force multiplied by distance, and since the object is stationary, no work is being done against gravity during this time.
How much work is done on a 40 N rock that won't move when pushed?
No work is done on the rock. Work is only done when there is displacement in the direction of the force applied, but since the rock does not move, no work is done.
What can be said about a situation in which work done is negative?
the formula F.S cos angle is used (the dot product) so if angle is 0,cos angle=1 hence work done is positive and maximum if angle is 90 so cos 90 is 0 hence work done is minimum if work done is negative the angle is 180 The work done by friction is always negative (opposite the force) Since work is force x displacement, a negative value for work could mean that the displacent was negative
What two condititons must be for work to be done?
work = the dot product of the force (F) and displacement vectors (D) = f * d * cos (theta), where 'f' and 'd' the magnitude of F and D, respectively; 'theta' is the angle between the two vectors. If theta = 90o, cos(theta) = 0. No work is done. That is, F is orthogonal to D. If d = 0, no work is done. That is, if the object is returning to the starting point, D = 0. ========================================
Work done is scalar or vector?
Physics as taught in high school would say that work is a scalar quantity.More sophisticated forms of physics would say that work done is a Quaternion, both a scalar and a vector.Work is bothw= [0,F][0,D]=[ 0 - F.D, 0 + 0 + FxD] = [-F.D, FxD] = -F.D + FxD. -F.D = -FDcos(FD) is scalar work out, andw= FxD= FDsin(FD) a vector called Torque.
How much work is done when a vertical force acts on an object moving horizontally?
as work done is dot product of force and displacement so cos(90)=0;therfore work done is zero
You exert a force of 75 newtons on a rock. You push and you push, but you can’t budge it. You are exhausted! How much work did you perform?
Unfortunately, 0. The rock has 0 displacement, so despite force being exerted no work was done (at least in physics terms).
When is the work done maximum?
Work is maximum when the force applied is in the same direction as the displacement of the object. In this case, the angle between the force and displacement vectors is 0 degrees, resulting in the highest work done. This is known as positive work.
Work is done on an object if F equals 25 N and distance traveled by the object is 0 meters true or false?
False. Work is defined as the product of the force applied on an object and the distance over which it travels. In this case, if the distance traveled is 0 meters, then no work is being done on the object regardless of the force applied (25 N in this scenario).
What should be the angle between force and displacement to get the minimum work and maximum work?
To minimize work, the angle between force and displacement should be 90 degrees (perpendicular). This is because work done is calculated as the dot product of force and displacement vectors, and the cosine of 90 degrees is 0, resulting in zero work. To maximize work, the angle should be 0 degrees (parallel), as the cosine of 0 degrees is 1, resulting in maximum work done.
