An 88-kg parachutist descends through a vertical height of 380 m with constant speed. Find the increase in entropy produced by the parachutist, assuming the air temperature is 21°C.
An 88-kg parachutist descends through a vertical height of 380 m with constant speed. Find the...
A 43.0 kg parachutist is moving straight downward with a speed of 3.70 m/s . If the parachutist comes to rest with constant acceleration over a distance of 0.775 m , what force does the ground exert on her? Express your answer to three significant figures and include the appropriate units. If the parachutist comes to rest over a shorter distance, is the force exerted by the ground greater than, less than, or the same as in part A? Explain.
A helicopter descends vertically to land with a speed of 4.0 m/s. If the shock absorbers have an initial length of 0.50 m, they compress to 79% of their original length and the air in the tires absorbs 21% of the initial energy as heat, what is the ratio of the spring constant to the helicopter's mass? Assume one landing gear in the craft i have that the answer is 1.1 kN/kg-m Could you please show your work and explain?...
Starting with an initial speed of 3.76 m/s at a height of 0.469 m, a 1.52-kg ball swings downward and strikes a 5.52-kg ball that is at rest, as the drawing shows. (a) Using the principle of conservation of mechanical energy, find the speed of the 1.52-kg ball just before impact. (b) Assuming that the collision is elastic, find the velocity (magnitude and direction) of the 1.52-kg ball just after the collision. (c) Assuming that the collision is elastic, find...
Starting with an initial speed of 5.40 m/s at a height of 0.329 m, a 2.07-kg ball swings downward and strikes a 4.27-kg ball that is at rest, as the drawing shows. (a) Using the principle of conservation of mechanical energy, find the speed of the 2.07-kg ball just before impact. (b) Assuming that the collision is elastic, find the velocity (magnitude and direction) of the 2.07-kg ball just after the collision. (c) Assuming that the collision is elastic, find...
A 2.74 kg block is pushed 1.41 m up a vertical wall with a
constant speed by a constant force of magnitude F applied at an
angle of 66.3 with the horizontal. The acceleration of gravity is
9.8 m/s2. If the coefficient of kinetic friction between the block
and wall 0.415, find the work done by F.
A 2.74 kg block is pushed 1.41 m up a vertical wall with a constant speed by a constant force of magnitude F...
Starting with an initial speed of 6.68 m/s at a height of 0.305 m, a 1.36-kg ball swings downward and strikes a 5.60-kg ball that is at rest, as the drawing shows. (a) Using the principle of conservation of mechanical energy, find the speed of the 1.36-kg ball just before impact. (b) Assuming that the collision is elastic, find the velocity (magnitude and direction) of the 1.36-kg ball just after the collision. (c) Assuming that the collision is elastic, find...
an aircraft flying at a constant speed and an altitude (height) of 9000 m drops a package, which hits the ground at a speed of 490 m/s. Assuming there was no air resistance on the package, what is the speed of the plane?
After deploying her parachute, a skydiver falls through the air with a constant speed of 9.00 m/s. As she falls, there is a constant breeze blowing west at 4.00 m/s. At what standard angle does the parachutist move? Express your answer using three significant figures. View Available Hint(s) IVO AO o e ?
A 4 kg stone is whirled at a constant speed in a vertical circle of radius 1 m. At the bottom of the circle the tension is 2mg. The speed of the stone is _____ m/s?
A block of mass m = 4.00 kg is lifted through a vertical displacement of magnitude d = 5.00 m in a time interval Δt = 20.0 s and at constant speed. What is the average power of the force doing the lifting?