Marla Payton
2021-12-16
Answered

Calculate the total potential energy, in Btu, of an object that is 20 ft below a datum level at a location where $g=31.7f\frac{t}{{s}^{2}}$ and which has a mass of 100 lbm.

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asked 2021-02-26

A tow truck pulls a car that is stuck in the mud, with a force of 2500 N as in Fig P5.27 The tow cable is under tension and therefor pulls downward and to the left on the pin at its upper end. The light pin is held in equilibrium by forces exerted by the two bars A and B. Each bar is a strut that is, each is a bar whose weight is small compared to the forces it exerts, and which exerts forces only through hinge pins at its ends. Each strut exerts a force directed parallel to its length. Determine the force of tension or compression in each strut. Proceed as follows Make a guess as to which way (pushing or pulling ) each force acts on the top pin Draw a free-body diagram of the pin. Use the condition for equilibrium of the pin to translate the free-body diagram into equations. From the equations calculate the forces exerted by struts A and B. If you obtain a positive answer, you correctly guessed the direction of the force. A negative answer means the direction should be reversed, but the absolute value correction should be reversed, but the absolute value correctly gives the magnitude of the force. If a strut pulls of a pin, it is in tension. If it pushes, the strut is in compression. Identify whether each strut is in tension or in compression.

asked 2020-12-01

Here is problem, please help

asked 2021-02-21

A small block with mass m is placed inside an inverted conethat is rotating about a vertical axis such that the time for onerevolution of the cone is T. the walls of the cone make an angle Bwith the vertical. The coefficient of static friction betweenthe block and the cone is ?. Draw a free body diagram.If the block is to remain a constant height h above the apex of thecone, what are the maximum and minimum values of T?

asked 2021-02-18

In an industrial cooling process, water is circulated through a system. If the water is pumped with a speed of 0.45 m/s under a pressure of 400 torr from the first floor through a 6.0-cm diameter pipe, what will be the pressure on the next floor 4.0 m above in a pipe with a diameter of 2.0 cm?

asked 2021-12-10

A flat slab of styrofoam, with a density of $32k\frac{g}{{m}^{3}}$ , floats on a lake.

What minimum volume must the slab have so that a 33kg boy can sit on the slab without it sinking?

What minimum volume must the slab have so that a 33kg boy can sit on the slab without it sinking?

asked 2021-03-08

Two balls, of masses ${m}_{A}=40$ g and ${m}_{B}=60$ g, are suspended each on a string of 30 cm long side by side, The lighter ball is pulled away to a 60 degree angle with the vertical and released.

a) What is the velocity of the light ball before impact? b) What is he velocity of each ball after the elastic collision? c) What will be the maximum height of each ball after the elastic collision?

a) What is the velocity of the light ball before impact? b) What is he velocity of each ball after the elastic collision? c) What will be the maximum height of each ball after the elastic collision?

asked 2020-11-09