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A subway train starts from rest at a station and accelerates at a rate of 1.60 m/s^2 for 14.0 s. It runs at constant speed for 70.0 s and slows down at a rate of 3.5 m/s^2 until it stops at the next station. What is the total distance travelled?
A boy throws up a ball 15m/s, how high will the ball go and what is the duration (total time) in the air from throw to catch
The leg and the cast in Fig 4.20 below weigh 220 N (w1). Determine the weight w2 and the angle α needed so that no force is exerted on the hip joint by the leg plus the cast.
A pedestrain bridge consists of a walkway of mass 1000kg and length 10.0m supported at each end by brackets. Two people, each of mass 80kg, are walking across the bridge.
How much heat flows from 1.0 kg of water at 40.0 degrees C when it is placed in contact with 1.0 kg of 16.0 degrees C water in reaching equilibrium, what is the change in entropy due to this heat transfer
A coil with magnetic dipole moment 1.5 A-m^2 is rotated initally with its magnetic moment parallel to a uniform magnetic field of 0.4T. what is the change in potential energy of the coil
A star radiates energy at the rate of 2.2 1026 W. Calculate the star's loss of rest mass per second
A solid sphere and a solid cylinder with the same mass and radius roll down an inclined plane without slipping. Which one will reach the bottom of the incline first. Explain why. Assume friction is negligible for both.
A small object with a mass of 380 mg carries a charge of 35.0 nC and is suspended by a thread between the vertical plates of a parallel-plate capacitor. The plates are separated by 5.00 cm. If the thread makes an angle of 12.0° with the vertical, ..
In 0.181s, through a distance of 8.05 m, a test pilot's speed decreases from 88.9m/s to 0m/s. If the pilot's mass is 70 kg, how much work is done against his body.
A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. What is the mass of the wheel
A block is at rest on a plank whose angle can be varied. The angle is gradually increased from 0 deg. find the kinetic coefficent of friction between the block and the plank
A rifle with a barrel length of 57 fires an 11 bullet with a horizontal speed of 440. The bullet strikes a block of wood and penetrates to a depth of 12. What resistive force (assumed to be constant) does the wood exert on bullet.
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