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Q1. A parachutist descending at a speed of 14.1 m/s loses a shoe at an altitude of 48.50 m. (suppose the positive direction is upward.)
(a) When does the shoe reach ground?
(b) What is the velocity of the shoe just before it hits ground?
Q2. A constant horizontal force Fa pushes a 3.70 kg FedEx package across a frictionless floor on which a xy coordinate system has been drawn. it gives the package's x and y velocity components versus time t. (The vx axis is marked in increments of 1.28 m/s and the vy axis is marked in increments of 2 m/s.)
(a) What is the magnitude of Fa?
What is its direction? (counter clockwise from the positive x axis)
What time would an observer on one of the two planets measure for the similar trip. Find out the coordinates of the center of gravity for this system.
What mass of stone is necessary if the temperature is not to drop below 18.5°C overnight. Sunlight shining in during the daytime is absorbed by the floor, interior walls, and objects in the room, raising their temperature to 37.5°C.
A copper telephone wire has essentially no sag between poles 20.5 meters apart on a winter day while the temperature is -15.5° C. How much longer is the wire on the summer day when the temperature is 27.0° C.
Calculating magnetic flux, induced current & magnetic field.
The coefficient of expansion of iron and zinc
A 75 g, 31 cm long rod hangs vertically on a frictionless, horizontal axle passing through its center. A 12 g ball of clay travelling horizontally at 2.1 m/s hits and sticks to a very bottom tip of the rod.
Ricardo walks 22.0 in a direction 50.0 west of north. Jane walks 20.0 in a direction 30.0 south of west. They after that stop and turn to face each other.
A paratrooper pilot fell 360 m after jumping without his parachute opening. He landed in a snow bank, creating a crater 1.50 m deep, but survived with only minor injuries. Assume the pilot's mass was 80 kg and his terminal velocity was 50 m/s.
What is the Bens kinetic energy
A father (m = 65 kg) and son (m = 38 kg) are standing facing each other on a frozen pond. The son pushes on the father and finds himself moving backward at 3.0 m/s after they have separated. How fast would the father be moving.
A lens placed at the origin with its axis pointing all along the x axis produces a real inverted image at x=-24cm that is twice as tall as the object. What is an image distance.
A Ferris wheel is a vertical, circular amusement ride with radius 6 m. Riders sit on seats that swivel to remain horizontal. The Ferris wheel rotates at the constant rate, going around once in 6.4 s. Consider a rider whose mass is 70 kg.
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