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A steel washer is suspended inside an empty shipping crate from a light string attached to the top of the crate. The crate slides down a long ramp that is inclined at an angle of 32? above the horizontal. The crate has mass 243kg . You are sitting inside the crate (with a flashlight); your mass is 63kg . As the crate is sliding down the ramp, you find the washer is at rest with respect to the crate when the string makes an angle of 72?with the top of the crate. What is the coefficient of kinetic friction between the ramp and the crate?
A playground is on the flat roof of a city school, 5.8 m above the street below (see figure). The vertical wall of the building is h = 7.30 m high, forming a 1.5-m-high railing around the playground. A ball has fallen to the street below, and a pa..
What is the height h of the CM of the can and contents (d) If x is the height of the remaining soda at any given instant, find out x when com reaches its lowest point.
Suppose the uranium nucleus was at rest just before the decay. If the α particle is emitted at a speed of 1.74×107 m/s, illustrate what would be the recoil speed of the thorium nucleus?
A hunter wishes to cross a river that is 1.4km wide and flows with a speed of 5km/h parallel to its banks.
Determine Maximum wavelength and Minimum wavelength. How various penguins of mass 16 kg each can stand on the ice block before they find their feet wet.
A loudspeaker of mass 22 {rm kg} is suspended a distance of h = 1.60 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.30 {rm m}.
The springs of a 1300kg car compress 6.00 mm when its 68 kg driver gets into the driver's seat. If the car goes over a bump, what would be the frequency of vibrations.
A coin rests 14.60 cm from the center of turntable. The coefficient of static friction between the coin and turntable surface is 0.350. The turntable starts from rest at t = 0 and rotates with the constant angular acceleration of 0.8400 rad/s2.
A curve in a road forms part of a horizontal circle. As a car goes around it at constant speed 14m/s, the total force exerted on the driver has magnitude 120 N. What are the magnitude and direction of the total vector force exerted on the driver i..
At one instant a bicyclist is 50 m due east of a park's flagpole, going due south with a speed of 9 m/s. Then, 24 s later, the cyclist is 45 m due north of the flagpole, going due east with a speed of 20 m/s. For the cyclist in this 24 s interval,..
what are the magnitude and direction of its acceleration. A potential difference of 80 mV exists between the inner and outer surfaces of the cell membrane. The inner surface is negative relative to the outer surface. How much work is required to ej..
In a head-on collision, the car stops in 0.279 from a speed of 16. The driver has a mass of 68, and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt during that fraction of a second.
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