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A man with mass 70.0 kg stands on a platform withmass 25.0 kg. He pulls on the free end of a rope thatruns over a pulley on the ceiling and has its other end fastened tothe platform. The mass of the rope and the mass of the pulley canbe neglected, and the pulley is frictionless. The rope is verticalon either side of the pulley.What is the acceleration of the rope relativeto him?
a 4.5kg ham is thrown into a stationary 15-kg shopping cart.at what speed will the cart travel if the ham had an initial speed of 2.2m/s, how long did the collision between the two last
A stream of water strikes a stationary turbine blade horizontally, as the drawing illustrates. Find the magnitude of the average force exerted on the water by the blade
The helium atom has a volume of about 3x10^(-30) m^3. What fraction of a volume of helium gas at STP is actually occupied by molecules
question1a house painter stands 3.0 m above the ground on a 5.0-m-long ladder that leans against a wall at a point4.7 m
A bicycle has wheels with a diameter of 0.650 m. Find the linear acceleration of the bicycle
Three forces acting on an object are given by Force 1 = (?1.5i + 5.50j) N, Force 2 = (4.85i ? 1.9j) N, and Force 3 = (?41.5i) N. What are the velocity components of the object after 17.0 s
A car with good tires on a dry road can decelerate at about 5.0 m/s2 when braking. Suppose a car is initially traveling at 55 mi/h. (a.) How much time does it take the car to stop.
A new block is attached to the first block. The new block is made of a different material and has a coefficient of static friction ? = 0.73. (When there is no friction the acceleration of the first block is 4.29 m/s2)
What are the first, second, and third frequencies audible from a 20cm long organ pipe when (1) only one end is open and when (2) both ends are open. The speed of sound through the air inside the organ pipe is 343 m/s. (Hint: if a harmonic does not..
a +3.0micro Coloumb point charge is placed at the origin, and a +12micro Coloumb is places at the point (2.0m,0), At what point along the x-axis is the electric field zero
Water is flowing through a pipe with a constriction. The area of the narrow section is one-half the area of the wide section. what is the velocity of the fluid in the narrow section
What is the decibel level required for human perception
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