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Q. Bicyclists in the Tour de France do enormous amounts of work during a race. For example, the average power per kilogram generated by Lance Armstrong (m = 75.0 kg) is 6.50 W per kilogram of his body mass. i. How much work does he do during a 110-km race in which his average speed is 12.5 m/s? ii. Frequently, the work done is expressed in nutritional Calories rather than in joules. State the work done in part (a) in terms of nutritional Calories, noting that 1 joule = 2.389 10-4 nutritional Calories.
Three equal point charges, each with charge 1.15 , are placed at the vertices of an equilateral triangle whose sides are of length 0.600 . What is an electric potential energy of the system? (Take as zero the potential energy of the three charges ..
An airplane is flying with a velocity of 95 at an angle of 19 above the horizontal. When the plane is a distance 111 m directly above a dog that is standing on level ground, suitcase drops out of luggage compartment.
Find tension in the back muscle and the compressional force
A small steel ball with a mass of 80 g is releasesd from a resting height of 1.25 m above a ridgid metal plate. What is the velocity of ball before impact.
How to find out the force of friction
A 1.65 block is attached to a spring with spring constant 17. While the block is sitting at rest, a student hits it with the hammer and almost instantaneously gives it a speed of 59.
The linear impulse delivered by the hit of a boxer is 248 N • s during the 0.373 s of contact. What is the magnitude of the average force exerted on the glove by the other boxer? React in units of N
The parallel metal plate of a capacitor is detached by a distance of 0.5cm and is connected to a 90v battery. Find the electric field between them and surface charge density on the plate.
Find the shear strain that results if a force of magnitude 8×10^5 is applied to the top square face of the plate, parallel to the side, and a force of equal magnitude is applied in the opposite direction to bottom face of the plate.
Vector A points in the negative y direction and has a magnitude of 3 units. Vector B has three times the magnitude and points in the positive x direction. Find out the direction and magnitude of the following vectors.
Heat is another word for thermal energy. Dissimilar materials at the same temperature can contain different amounts of heat.
An Atwood machine consists of two masses, = 6.5 and = 8.5 , linked by a cord that passes over a pulley free to rotate about a fixed axis. The pulley is a solid cylinder of radius = 0.40 and mass 0.80 .
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