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An elevator has a mass of 1000 kilogram and carries a maximum load of 800 kilogram. A constant frictional force of 4000 Newton retards its motion upward. Find what must be the minimum power delivered by the motor to lift the elevator (fully loaded) at a constant speed of 3 m/s.
q1. if 730 nm and 675 nm light passes throughout two slits 0.63 mm apart how far apart are the second-order fringes for
Consider a simple model for the interior of the Earth: there is a spherical iron core with constant mass density ?0 and radius a; outside the core is "rock" with constant density ?1. Calculate the radius a of the iron core
The outstretched hands and arms of a figure skater preparing for a spin can be considered a slender rod pivoting about an axis through its center. (See the figure below (Figure 1) .) When the skater's hands and arms are brought in and wrapped arou..
A very long cylinder with radius 5.54 cm has a uniform density of charges throughout it. If the charge density in the cylinder is 1,304 nC/m3 (nanoCoulombs per cubic meter). Inside the cylinder, for distances x (less than the radius) from the cent..
The two blocks areconnected by heavy uniform rope with mass of 4.00 kg. An upward force of 200N is applied as show in fig P4.54 a) Draw a three free body diagrams: one for the 6.00 kg block, one for the 4.00 kg rope, and another for the 5.00 kg block..
W hat is the magnitude of an average force exerted on the superball by the sidewalk. what is force caused by the water on the bottom.
three particles are fixed on an x axis. particle 1 of charge q1 is at x -a and particle 2 of charge q2 is at x a. if
An unknown substance has a mass of 0.125 kg and an initial temperature of 80.0°C. calculate the specific heat of the unknown substance
A spherical balloon is made from a material whose mass is 3.86 kg. The thickness of the material is negligible compared to the 2.16-m radius of the balloon. Find the absolute pressure of the helium gas
A horizontal spring is lying on a frictionless surface. One end ofthe spring is attached to a wall whle the other end is connected toa movable object. The spring and object are compressed by0.074 m, released from rest, and subsequently oscillate b..
Four identical springs are used as part of a car's system, one on each wheel. what is the spring constant of each of these springs
A 3.0 kg mess kit sliding on a frictionless surface explodes into two 1.5 kg parts, one moving at 2.1 m/s, What is the original speed of the mess kit
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