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To determine the location of his center of mass, a physics studentlies on a lightweight plank supported by two scales 2.5 mapart. If the left scale reads 290N and the right scale reads122N, find
a) the students mass and
b) the distance from the student's head to his center of mass.
A 108m long train starts from rest (at t=0) and accelerates uniformly. At the same time (at t=0), a car moving with constant speed in the same direction reaches the back end of the train. find the cars speed and the trains acceleration
Suppose a flat roof has a surface area of 1.29000×102 m2. What is the force with which the air inside the house pushes the roof upward
An arrow is fire with a speed of 20m/s at the block of Styrofoam resting on a smooth surface. The arrow penetrates a certain distance into the block before coming to rest relative to it.
An air-filled capacitor consists of two parallel plates, each with an area of 7.60 cm2, separated by a distance of 1.95 mm. If a 21.7-V potential difference is applied to these plates, calculate the following. (a) the electric field between the pl..
Suppose a car is traveling at +16.8 m/s, and the driver sees a traffic light turn red. After 0.569 s has elapsed, calculate the stopping distance of the car
You are assigned the design of a cylindrical, pressurized water tank for a future colony on Mars, where the acceleration due to gravity is 3.71 meters per second per second. Find the net downward force on the tank's flat bottom
A current of 10^-14 A is produced in a free-air chamber operating under saturation conditions. The sensitive volume, in which electronic equilibrium exists, contains 0.22g of air. What is the exposure rate .
A 42.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 1.28*10^2 m/s from the top of a cliff 140 m above level ground, What is the initial total mechanical energy of the projectile
A block is released from rest at the top of a frictionless ramp (inclined plane) that makes an angle of 25° with respect to horizontal. What is the length of the ramp D1
A 20.0 kg wood ball hangs from a 1.70 m-long wire. The maximum tension the wire can withstand without breaking is 500 N. What is the largest speed this projectile can have without causing the cable to break
A cylindrically shaped piece of collagen (a substance found in the body in connective tissue) is being stretched by a force that increases from 0 to 2.73 10-2 N. How much work is done by the variable force that stretches the collagen
The maximum pressure that can be obtained in your local mechanic's hydraulic pump is 2.0 x 10^5 Pa. what is the largest mass (of car) for which the pump will work
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