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The speed of a bobsled is increasing because it has an acceleration of 2.4 m/s2. At a given instant in time, the forces resisting the motion, including kinetic friction and air resistance, total 450 N. The mass of the bobsled and its riders is 245 kg.
a) What is the magnitude of the force propelling the bobsled forward?b) What is the magnitude of the net force that acts on the bobsled?
A convex mirror has a focal length of magnitude 7.63 cm. Find the magnification of the image.
Usain Bolt is running a 100m dash. He accelerates to top speed over the first 45 m, then runs at a constant speed for the last 55 m, What is his top speed
A small mass is stuck to a point on the rim of a rolling wheel(radius of r) .. which traces out a path called a cycloid. The position vector of this point is given by r(theta)= r(theta - sin theta)i +r(1-cos theta)j. For a wheel rolling with constant..
Calculate the ratio of the number of HBr molecules in state
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A 1,030-kg car is pulling a 285-kg trailer. Together, the car and trailer have an acceleration of 2.00 m/s2 in the positive x-direction. determine the force exerted by the trailer on the car
Two stars in a binary system orbit around their center of mass. The centers of the two stars are 7.53x1011 m apart. What is the mass of the smaller star
A mass m1 = 5.4 kg rests on a frictionless table and connected by a massless string to another mass m2 = 4 kg, How much work is done by the force F on the two block system
A circular coil having 19 turns and a radius of R = 19.2cm carries a current of 3.30A. It is placed in a uniform magnetic field of 62.0mT. What is the magnitude of the torque acting on the coil
The Calorie (or kcal) is another energy unit and is commonly used to measure food energy (as well as heat). How many Calories would you burn walking up a flight of stairs for an hour
Find the diameter of an aluminum rod that would conduct heat at the same rate as a 2.816 cm diameter copper rod of the same length
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