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A weight lifter does a series of arm raises while holding a 7.50 kg weight. Her forearm (including the hand) starts out horizontal and pivots to a vertical position about her elbow. The mass of the lower arm plus hand is 5.00 kg, uniformly distributed along its 35.0cm length.
With each arm raise, by how much does the center of mass of her forearm (including her hand and the weight) rise?
What is the change in its gravitational potential energy with each arm raise?
The length of a rectangualr piece of land is 100 ± 1 m and its width is 50 ± 1 m. What is the perimter of the land
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A sled weighing 200 N is held in place by static friction on a 15? incline, What is the coefficient of static friction between the sled and the incline
question1sarah age 55 is experiencing some hot flashes of menopause and wants to mange her symptoms without taking
An Olympic long jumper leaves the ground at an angle of 19.8 ° and travels through the air for a horizontal distance of 8.17 m before landing. What is the takeoff speed of the jumper
Two tugs A and B pull a ship along a direction XO. Tug A exerts a force of 30kN at an angle of 15 degrees to XO, Find the angle X for the resultant force on the boat to be along XO
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Find the capacitance of a parallel plate capacitor that has two square plates both having a side length of 6 cm, where these plates are seperated by 15 mm
When the coil of a motor is rotating at maximum speed, the current in the windings is 4.33 A. When the motor is first turned on, calculate the resistance of the windings.
A 7.80-g bullet moving at 480 m/s penetrates a tree trunk to a depth of 6.0 cm. Use work and energy considerations to find the average frictional force that stops the bullet
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