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1. A 9.0-kg hanging weight is connected by a string over a pulley to a 5.0-kg block sliding on a flat table. If the friction force between the block and the table is 35N, find the tension in the string.
2. a sled of mass 1 kg has an initial speed of 1.00m/s across a horizontal surface. the force of friction between the sled and surface is 0.2N. What is the speed of the sled after it ha traveled a distance of 2.00m.
An attacker at the base of a castle wall 3.63 m high throws a rock straight up with speed 8.80 m/s at a height of 1.51 m above the ground. Find the change in speed of a rock
If the kinetic energy density of a fluid decreases along a horizontal streamline, what happens to the pressure of the fluid
A certain camera has f-numbers that range from 1.7 to 29. If the focal length of the lens is 57 mm, what is the range of aperture diameters for the camera
A wheel is spinning clockwise at a 10 revolutions per second at t = 0. Due to friction in the bearings supporting the axle, the wheel slows down, losing 0.500 revolutions per second in angular velocity each second, until it comes to rest.
How various kilograms of nitrogen are boiled away in time of 7.50 h. car that hits a line of water barrels and takes 1.8s to stop.
Two small metallic spheres, each of mass m = 0.25 g, are suspended as pendulums by light strings from a common point as, compute the magnitude of the charge on each sphere
An object known to be made of copper (p=8.89 g/cm^3) and aluminum (p=2.7 g/cm^3) "weighs" 25 g in air but only 20 g in water. How much copper is in the object
a car traveling at 95 km/hr. is 210 m behind a truck traveling at 75 km/hr. How long will it take the car to catch the truck
Bob can throw a 460 g rock with a speed of 32 m/s. What is Bob's maximum power output as he throws the rock in kW
In a non-uniform gas, the equation of state is valid locally, as long as the density does not change too rapidly with position. Find the density as a function of height
For the 4-particle system find the moment of inertia about the y-axis, that passes through the two masses on the left-hand side of the system.
Find an expression for the electric potential at the center. A proton is released from rest in a uniform electric field of magnitude 1.20×10^5 N/C. Find the speed of the proton after it has traveled.
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