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A man is using a cord to tow a sled at constant speed on a horizontal ground surface. The mass of the sled is 10 kg. The man pulls on the cord with a force of 71 N. The cord is straight and at an angle of 29° above the horizontal. How big is the normal force (in N) of the ground on the sled?
A 2.03 kg book is placed on a flat desk. Suppose the coefficient of static friction between the book and the desk is 0.502, How much force is needed to keep the book moving at constant speed once it begins moving
The random noise level of a buzzing mosquito is 32dB and that heard in a typical classroom is 71dB. How many mosquitos are required to make a noise level equivalent to that heard ina typical classroom
while unloading furniture, a worker slides a heavy box down the ramp on the rope. find the mass of the box
A proton is located at x = 1.0 nm, y = 0.0 nm and an electron is located at x = 0.0 nm, y = 4.0 nm. Find the attractive Coulombic force between them
A cylindrical fishing reel has a moment of inertia of I =6.30E-4 kg*m2 and a radius of 3.86 cm. What is theforce of the fish on the line
A circus performer stretches a tightrope between two towers. He strikes one end of the rope and sends a wave along it toward the other tower. find the tension in the tightrope
The sound intensity 44 m from a wailing tornado siren is 0.10 W/m2 -. Estimate the maximum distance at which the siren can be heard
The clapper is a small, 1.8 kg mass attached to one end of a slender rod that has length L and negligible mass. The other end of the rod is attached to the inside of the bell
Sewage at a certain pumping station is raised vertically by 5.30 m at the rate of 1 920 000 liters each day. The sewage, of density 1 050 kg/m3, Find the output mechanical power of the lift station
A 117 kg fullback runs at the line of scrimmage. How fast was he running initially
a bar of mass m = 0.260 kg that can slide without friction on a pair of rails separated by a distance = 1.20 m and located on an inclined plane that makes an angle ? = 29.0° with respect to the ground. With what constant speed v does the bar slide ..
A sled of mass m is given a kick on a frozen pond. The kick imparts to it an initial speed of vi = 2.00 m/s. find the distance the sled moves before it stops
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