A force is applied to a block on a frictionless inclined surface as shown in the diagram. What magnitude force is necessary to keep the block from sliding down the incline? The mass of the block is 69.7 kg and the angle of incline is 45.2 degrees. The magnitude of the force is _?

Identify the amplitude on the diagram and give the correct description. question 3 options: a because amplitude is the distance from wave crest to wave crest. b because the wavelength shows amplitude. c because amplitude is the distance between a crest (or trough) and rest. d because wavelength show amplitude. (brainiest if you get it right! ) ~kayla

An object weigh 40n in air ,weigh 20n when submerged in water,and 30n when submerged in a liquid of unknown liquid density.what is the density of unknown of liquid?

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer