Give an example of how friction can be used and an example of how friction can be harmful

What is the magnitude φinitial of the magnetic flux through one turn of the coil before it is rotated?

Describe the useful energy transfer taking place in the vacuum cleaner.

A train of mass 800000kg is slowing down. What acceleration is produced if the braking force is 1400000

A car is at an initial velocity of 100km/h [north] and has a constant acceleration of 4m/s^2 [south]. After 6 seconds what is its final velocity?

Is Li greater than He on the periodic table?

If almost any system in stable equilibrium is slightly disturbed, it will then exhibit simple harmonic motion because 1. the change in potential energy is proportional to the cube of the displacement from the equilibrium position. 2.

Is the following statement true or false? Nuclear fission occurs naturally in stars.

Why is it useful to calculate average speed?

Which describes freefall

Suppose you were examining a pulsing radio signal from a stellar remnant in a distant part of the Milky Way.