Civil and Environmental Engineering Answers

Where must a 500 N weight be hang on a uniform beam with a length of 5 m and weighing 150 N so that a woman at one end of the beam carries only one fourth as much load as a man at the other end?

A force of 150 N pushes a box. Starting form rest, the box achieves a velocity of 1.50m/s 2.5 s. Find the coefficient of sliding friction between the box and the floor.

A 40 kg can of paint rests on a ledge 20 m above ground. A taut rope attached to the can passes over a pulley and straight down to a 3.0kg can of nails. If the can of paint is accidentally knocked off the ledge, how much time does a carpenter have in order to catch the can of paint before it smashes on the ground?

A block weighing 60 N rests on a horizontal floor. What is the minimum force that will make the block move if the coefficient of static friction is 0.20? What is the minimum force that will keep the block moving at uniform speed once it starts moving it the coefficient of kinetic friction is 0.10?

A 1000 kg mass elevator has an acceleration of 1m/s

Two masses of 8 kg and 12 kg are tied to each end of a string passing over a massless and frictionless pulley. Find the resulting acceleration of each mass.

A force of 20 N acts upon a body whose weight is 8 N. What is the mass of the body? What is it's acceleration?

Assume Sabine's formula is valid for oscillations, calculate the reverberation time of sound wave of the relaxation time is 2 μS.

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