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1. If we had used a heavier strong, the graphs (velocity vs. time) would not have been exactly linear, but would of curved slightly. Why? Which way would it curve? Hint: Think of acceleration at the beginning and acceleration at the end.
2. explain why a traction elevator uses a counterweight and discuss how they set the mass of the counterweight (reference to Newtons' 2nd law of translation).
3. If we use the same setup as in lab with one simple change we can some up with a way to meaure the coeeficient of friction between a mass and the lab table. We use the same computer program (measures v vs. t) but plave the pulley system near the edge of the table with one mass hanging off the end (m1) and one mass resting on the table (m2). The mass m2 is able to slide towards the pulley system as m1 drops towards the floor (away from the pulleys). If the force of friction between m2 and the table is F=umg2, come up with a theoretical equation to figure out u (you can assume that you can get the same style of data that you did in this lab, that is, graphs, masses, etc.)
a current of 1.35 a in an inductor l results in a stored energy of 0.135 j. the current is then changed to 6.48 a in
Using the elbow joint as the axis of rotation, determine the magnitude of the net torque acting about the elbow due to the forearm, hand, and ball
The Lunar Lander of mass 1.9Ã?104kg made the last 150m of its trip to the Moon's surface in 120s, determine the upword force required to decend at a constant speed
A current of 2.0 A is flowing along the z-axis in the positive z direction from the origin to z=-2 m. Find the magnetic field, Which field is the strongest and Why
A square loop 10cm on a side carries a current I' = 1A, and is placed 10cm away from a long,straight wire of current I = 10A, Calculate the net force on the loop
An object is 17 mm in front of a converging lens, and the image is 3 mm behind the lens. What is the focal length of the lens? Reply In mm
A storage tank 27 m high is filled with pure water, Calculate the magnitude of the net force that acts on a square access hatch at the bottom of the tank that measures 0.6 m by 0.6 m
If the coefficient of kinetic friction between a 35.0 kg crate and the floor is 0.25, what horizontal force is required to move the crate at a steady speed across the floor
a meteorologist for a tv station is using radar to determine the distance to a cloud. he notes that a time of 0.28ms
A 5cm radius sphere is filled with a uniform volume charge with charge density 2.3\times10-6C/m3, Calculate the electric flux out of the surface of the cube
the archerfish hunts by dislodging an unsuspecting insect from its resting place with a stream of water expelled from
A 175-g object is attached to a spring that has a force constant of 72.5 N/m, Find the locations of the object when its velocity is one-third of the maximum speed
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