Question

In: Civil Engineering

Dynamics of Rigid Bodies 1. The body has a mass of 100 kg and is pulled...

Dynamics of Rigid Bodies

1. The body has a mass of 100 kg and is pulled up a 75 percent inclined by a force P. The coefficient of friction f is 0.25 between contacting surfaces.
a) determine the constant value of P required to bring the body from the rest to a velocity of 6 m/s in 10s

b) what value of P will then suffice to maintain that velocity?

2. A nozzle on the end of a fire hose is 20 m from a vertical wall and makes an angles of 45 degrees with the horizontal. If the stream strikes the wall at a point 8 m above the nozzle, what us the velocity of water as it leaves the nozzle?

Solutions

Expert Solution


Related Solutions

a ) The moment of inertia of a rigid body, of mass 40 kg, about an...
a ) The moment of inertia of a rigid body, of mass 40 kg, about an axis through a point at 0.5 m from the mass centre, is 110 kg.m2. What is the moment inertia of the same body about an axis, parallel to the first, at a distance 1.0 m from the mass centre? [4 marks] i) A metal hoop, with mass m concentrated along its rim, has radius r, and rolls on a fixed surface without slipping. It...
Two celestial bodies are  apart. One body has a mass of  , and the second has a mass...
Two celestial bodies are  apart. One body has a mass of  , and the second has a mass of  Calculate the strength of the gravitational force exerted by one body on the other.
A sledge loaded with bricks has a total mass of 18.2 kg and is pulled at...
A sledge loaded with bricks has a total mass of 18.2 kg and is pulled at constant speed by a rope. The rope is inclined at 20.1° above the horizontal, and the sledge moves a distance of 19.2 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.500. (a) What is the tension of the rope? N (b) How much work is done by the rope on the sledge? kJ (c) What is...
A block with a mass of 3.2 kg is pulled by a force of 60 N...
A block with a mass of 3.2 kg is pulled by a force of 60 N up a ramp with a coefficient of kinetic friction of .05 on a 12° incline. a. What is the magnitude of the block’s acceleration? b. Draw a free body diagram of this block.
A mass m = 17 kg is pulled along a horizontal floor, with a coefficient of...
A mass m = 17 kg is pulled along a horizontal floor, with a coefficient of kinetic friction μk = 0.06, for a distance d = 5.1 m. Then the mass is continued to be pulled up a frictionless incline that makes an angle θ = 28° with the horizontal. The entire time the massless rope used to pull the block is pulled parallel to the incline at an angle of θ = 28° (thus on the incline it is...
A mass m = 16 kg is pulled along a horizontal floor with NO friction for...
A mass m = 16 kg is pulled along a horizontal floor with NO friction for a distance d =8.4 m. Then the mass is pulled up an incline that makes an angle ? = 25
A mass m = 17 kg is pulled along a horizontal floor, with a coefficient of...
A mass m = 17 kg is pulled along a horizontal floor, with a coefficient of kinetic friction ?k = 0.06, for a distance d = 6.7 m. Then the mass is continued to be pulled up a frictionless incline that makes an angle ? = 33° with the horizontal. The entire time the massless rope used to pull the block is pulled parallel to the incline at an angle of ? = 33° (thus on the incline it is...
A box of mass m=19.0 kg is pulled up a ramp that is inclined at an...
A box of mass m=19.0 kg is pulled up a ramp that is inclined at an angle θ=15.0∘ angle with respect to the horizontal. The coefficient of kinetic friction between the box and the ramp is μk=0.295 , and the rope pulling the box is parallel to the ramp. If the box accelerates up the ramp at a rate of a=3.09 m/s2, calculate the tension FT in the rope. Use g=9.81 m/s2 for the acceleration due to gravity.
A ring of mass 10 kg is being pulled by three ropes, similar to the ring...
A ring of mass 10 kg is being pulled by three ropes, similar to the ring on the force table experiment from your lab class. One rope is pulling with a force of 200 N, the second rope is pulling with a force of 300 N and in a direction that is 98 degrees counterclockwise from the first rope. The third rope is pulling with a force of 400 N and in a direction that is 90 degrees clockwise from...
A crate of mass 10.3 kg is pulled up a rough incline with an initial speed...
A crate of mass 10.3 kg is pulled up a rough incline with an initial speed of 1.43 m/s. The pulling force is 93.0 N parallel to the incline, which makes an angle of 19.4° with the horizontal. The coefficient of kinetic friction is 0.400, and the crate is pulled 4.97 m. (a) How much work is done by the gravitational force on the crate? J (b) Determine the increase in internal energy (related to thermal energy, having the opposite...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT