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Q. Suppose the roller coaster in Fig. 6-41 (h1 = 36 m, h2 = 14 m, h3 = 25) passes point 1 with a speed of 2.00 m/s. If the average force of friction is equal to one sixth of its weight, with what speed will it reach point 2? The distance traveled is 55.0 m.
Q. An Atwood machine consists of two masses (m1 = 225 grams, m2 = 385 grams) connected by a string over a frictionless pulley. The initial heights above the floor are H1 = 172 cm and H2 = 246 cm. Both masses start from rest at point A in the position shown; point B is just as m2 hits the floor. The total mechanical energyin the system is 13.1.
what is the kinetic energy of the system at point b?
A car travelling at 23 m/s runs out of gas while travelling up a 20 degree slope. How far up the hill will it coast before starting to roll back down.
A 12 kg mass starts from rest and slides down an inclined plane 8.0 10-1 m long in 0.9 s. What net force is acting on the mass along the incline?
A bucket of water is whirled in a vertical circle of radius 90cm,What is the least speed that will keep the water from falling out.
Concept to find certain type of electronic devices & circuits.
Charge A and charge B are 2.5 m apart. Charge A is 1.4C and charge B is 2.5C. Charge C, which is 2.0 C, is situated between them and force on charge C is zero. How far from charge A is Charge C.
compute the force exerted by the man, the work done by the man on the piano, the work done by the friction force, the work done by the force of gravity, and the net work done on the piano.
A gas expands from I to F. The energy added to the gas by heat is 442 J when the gas goes from I to F along the diagonal path. What is the change in internal energy of the gas.
A jogger accelerates from rest to 5.87 m/s in 3.53 s. A car accelerates from 21.3 to 34.7 m/s also in 3.53 s. (a) Find the magnitude of the acceleration of the jogger. (b) Find out the magnitude of the acceleration of the car. (c) How much further..
Which is safer as a road material
A small grinding wheel has a moment of inertia of 4.0×10-5 kg m^2. What net torque must be applied to the wheel for its angular acceleration to be 160 rad s^2.
Compute the momentum of the bullet
A 1590 kg car starts from rest on a horizontal road and gains a speed of 61 km/h in 30 s (a) what is its kinetic energy at the end of the 30 s.
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