The diagram shows a lever. A weight is near the end of the lever. A force, F, pushes up on the pad and balances the lever.
(a)
The 50 N weight is pulling the lever anticlockwise around the pivot.
Calculate the moment (turning effect) of the 50 N weight about the pivot.
Give the units

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?

The chart shows the costs and shipping times for materials that a company needs to build a new product. which describes the best trade-off if the company needs to start building their product within the next two years? they should order the domestic materials because it is always best to choose the fastest shipping time. they should order the imported materials because it is always best to choose the lowest cost for materials. since the shipping time is longer, they should order the domestic materials because the additional cost is worth it to get the materials in time. even though the shipping time is longer, they should order the imported materials because they are less expensive and should arrive in plenty of time to build the product.