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Question: Two ice skaters, Daniel (mass 65.0 kg) andRebecca (mass 45.0 kg), are practicing. Daniel stopsto tie his shoelace and, while at rest, is struck by Rebecca, whois moving at 13.0 m/s before she collides with him.After the collision, Rebecca has a velocity of magnitude 8.00m/s at an angle of 53.1^\circ from her initial direction. Both skaters move onthe frictionless, horizontal surface of the rink.
A. What is the magnitude of Daniel's velocity after thecollision?
B. What is the direction of Daniel's velocity after thecollision?
C. What is the change in total kinetic energy of the twoskaters as a result of the collision?
The density of gasoline is 7.30 × 102 kg/m3 at 0°C. Its average coefficient of volume expansion is 9.60 × 104 (°C)1, Evaluate the mass of 11.0 gal of gas at 0°C
1. The number of people this planet can support is largely determined by the amount of ammonia-based fertilizer that can be produced. Without the ability to chemically manufacture ammonia, the world's population would be closer to 1/6 of its curre..
What is the velocity of the plank relative to the surface of ice.
Calculated the magnetic field along the axis of a circular loop of wire of radius a carrying a current I as a function of the distance x from the center.
A compact disk player has just been turned off. A disk decelerates uniformly from an initial angular velocity of 7.20 rev/s.The disk rotates through 3.25 revolutions before coming to rest. What is the tangential acceleration of apoint on the disk ..
Assume a straight 1 millimeter diameter copper wire could just "float" horizontally in air because of the force due to the Earth's magnetic field (B), Estimate what current would the wire carry
a small car collides with a large truck. is the magnitude of the force experienced by the car greater than less than or
Three equal charges are placed at the corners of an equilateral triangle 0.50 m on a side. What is the magnitude of the force on each charge if the charges are each 3.1 × 10-9 C
a 3-kg rock is tied to the end of a string and twirled overhead 1.9 m above the ground in a 0.8-m radius horizontal
Two particles are moving along the x axis. Particle 1 has a mass m1 and a velocity v1 = +3.7 m/s. Find the ratio m1/m2 of the masses of the particles
Compare the kinetic energy of car travelling. Compare the kinetic energy of an 900 kg car travelling at 30 m/s, and a 1,800 kg car at the same speed.
consider a crate at rest on a factory floor. As the pair of workers start to lift it, What happens to the support force acting on the workers feet
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