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A 100 kg sled is slid across a smooth ice field by a group of four dogs tied to the sled pulling with a 350 N force along a rope at an angle of 20 degrees above the horizontal. (a) If the sled travels at a constant speed, find the drag force on the sled. (b) Find the work done by the dogs after pulling the sled for 1 km.
In a particular x-ray tube, an electron approaches the target moving at 1.10 108 m/s. It slows down on being deflected by a nucleus of the target, compute the final speed of the electron
A trunk with a weight of 230 N rests on the floor. The coefficient of static friction between the trunk and the floor is 0.32, what would be the acceleration of the trunk
A person's left eye has a near point of 18.0 cm and a far point of 2.50 m. What power contact lens would you recommend
Two blocks are connected by a cord passing over a small (frictionless) pulley as shown below. The angle ? = 30 degrees, what is the mass, M, of the large block
With brakes fully applied, a 1670 kg car deccelerates from a speed of 77.0 km/hr. What is the change in the kinetic energy of the car
Suppose that after a centrifuge in a medical laboratory is turned off, it continues to rotate with a constant angular deceleration for 10.40 s before coming to rest. How numerous revolutions did the centrifuge complete after being turned off.
The length of a simple pendulum is 0.87 m and the mass of the particle (the "bob") at the end of the cable is 0.21 kg. What is the angular frequency of the motion
A wire that has a resistance of 5 is passed through an extruder so as to make it into a new,What is the resistance of the new wire
A shot-putter accelerates a 7.28 kg shot from rest to 14.8 m/s. If this motion takes 1.31 s, what average power was developed
Consider a mixed RLC circuit where an ideal capacitor of capacitance C = 60.0 ?F, What is the resonance frequency of this mixed RLC circuit
An electron is located on a pinpoint having a diameter of 1.90 µm. What is the minimum uncertainty in the speed of the electron
A sealed cubical container 17.0 cm on a side contains three times Avogadro's number of molecules at a temperature of 21.0°C. Find the force exerted by the gas on one of the walls of the container
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