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A 75.0 kilogram ice skater moving at 10.0 m/s crashes into a stationary skater of equivalent mass. After the collision, the two skaters move as a unit at 5.00 m/s. If the impact time is 0.140 second, find the magnitudes of the average forces experienced by each skater during the collision?
Force experienced by moving skater N
Force experienced by stationary skater
N
A student sitting on a frictionless rotating stool has rotational inertia 0.90kg?m2 about a vertical axis through her center of mass when her arms are tight to her chest. Ignoring her arm mass, what's her new rotational velocity
A motor has an armature resistance of 2.5 Ohms. If it draws 10 A when running at full speed and connected to a 100 V line, how large is the back emf?
A rocket is fired from the ground as a projectile. At the top of its trajectory, at a horizontal distance of 260m from the launch point, the rocket breaks into two pieces: One fragment having1/3 of the mass of the original rocket and the remaining pi..
A point particle that has a charge of 18.5 µC is located at x = 0, y = 0 and a point particle that has a charge q is located at x = 14.8 cm, y = 0. The electric force on a point particle that has a charge of 7.4 µC at x = 29.6 cm, y = 0 is -(19.7)..
What would be the speed of the boxes while box B has fallen a distance of 0.5m? The coefficient of kinetic friction between box A and the surface it slides on is 0.20. Make use of conservation of energy.
A person decides to use an old pair of eyeglasses to make someoptical instruments. What is the maximum angular magnification he can produce
a 20 cm tall object is placed in front of a concave mirror with a radius of 29 cm. the distance of the object to the
An astronaut leaves Earth in a spaceship at a speed of 0.280C relative to Earth. If the destination is a star system 12.5 light-years away as measured by an observer on Earth, what is the distance to the star system as measured by the astronaut..
If the current in the circuit is 0.15 A and the resistances are R1 = 100 ? and R2 = 260 ?, what is the emf of the battery.
Young’s double slit experiment is performed with blue-green light of wavelength 500 nm. The slits are 1.20 mm apart, and the viewing screen is 5.40 m from the slits. How far apart are two adjacent bright fringes? What is the angular separation of two..
q1. a weight of 1200 n rests on a lever at a point 0.50 m from a support. on the same side of the support at a distance
A horizontal 2.00-m long, 5.00-kg uniform beam that lies along the east-west direction is acted on by two forces. At the east end of the beam, What is the angular acceleration of the beam
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