A 5.0 kg block is pushed 3.0 m at a constant velocity up a vertical wall by a
constant force applied at an angle of
30.0° with the horizontal. If the coefficient of kinetic
friction between the block and the wall
is 0.30, determine the following:
a. the work done by the force on the block
b. the work done by gravity on the block
c. the magnitude of the normal force between the
block and the wall

Which of the following statements are true of solids? a.the particles do not vibrate. b.the particles are in a fixed location. c.they have strong intermolecular forces between the atoms or molecules. d.the particles have less kinetic energy than those of liquids or gases.

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration