During heavy rain, a section of a mountainside measuring 3.8 km horizontally (perpendicular to the slope), 0.44 km up along the slope, and 2.7 m deep slips into a valley in a mud slide. Assume that the mud ends up uniformly distributed over a surface area of the valley measuring 1.2 km x 1.2 km and that the mass of a cubic meter of mud is 1900 kg. What is the mass of the mud sitting above a 3.7 m2 area of the valley floor?

During heavy rain, a section of a mountainside measuring 3.8 km horizontally (perpendicular to the slope), 0.44 km up along the slope, and 2.7 m deep slips into a valley in a mud slide. Assume that the mud ends up uniformly distributed over a surface area of the valley measuring 1.2 km x 1.2 km and that the mass of a cubic meter of mud is 1900 kg. What is the mass of the mud sitting above a 3.7 m2 area of the valley floor?
you push with a 20-n horizonal force on a 2-kg mass resting on a horizonal surface. the horizonal frictional force is 12 N . show that the accerleration is 4m/s2.
how many joules of potential energy does 1.5-kg book gain when it is elevated 2 m? when it is elevated 4 m
(let g= 10 N/kg)
calculated the number of joules of kinetic energy a 1-kg parrot has when it flies at 6m/s.
A skateboarder in a death-defying stunt decides to launch herself from a ramp on a hill. The skateboarder leaves the ramp at a height of 1.4 m above the slope, traveling 15 m s-1 and at an angle of 40o to the horizontal. The slope is inclined at 45o to the horizontal. a) How far down the slope does the skateboarder land? b) How long is the skateboarder in the air? c) With what velocity does the skateboarder land on the slope?