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Find, using integration, the work done in compressing a spring by a distance x.

[integral from 0 to x']dW= [integral from 0 to x'] F(x') dx'

=[integral from 0 to x']kx' dx'

=1/2k

Answered by Matteo T. • Physics tutor

3784 Views

Please explain air resistance.

Both air and water are made up of lots of tiny particles. When you run your hand through water, there is some resistance to motion caused by the interaction between your hand and the water particles. In a...

Answered by Harris V. • Physics tutor

2150 Views

Why does magnetic field do no work on an electric charge?

There is a qualitative and a quantitative way to show that the magnetic field does no work on electric charges. The qualitative description requires a picture; essentially, one looks at the circular orbit...

Answered by Jergus S. • Physics tutor

2333 Views

Sue's brother is on a sled on top of ice (assume no friction). Sue is pulling her brother with 15 N of force at a 38 degree angle above the horizontal. Calculate the work done if she pulls him for 50 meters.

Using the equation W = F * d we know work is equal to the force in the same direction as the distance moved. To find the force in the same direction as the distance we must find the horizontal component. ...

Answered by Emily B. • Physics tutor

1711 Views

Describe the motion of a moving object with a given Displacement-Time graph. For each section on the graph, indicate the direction of motion and identify if the object is accelerating or not. What would the object's Velocity-Time graph look like?

Section 1: The object is moving away from its origin with a constant speed. There is no acceleration as demonstrated by the linear increase in displaceme...

Answered by Tomek E. • Physics tutor

6148 Views