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A 51-kg skier coasts up a snow-covered hill that makes an angle of 25° with the horizontal. The initial speed of the skier is 6.2m/s. After coasting 1.9 m up the slope, the skier has a speed of is 3.7 m/s.
(a) Find the work done by the kinetic frictional force that acts on the skis.
J
(b) What is the magnitude of the kinetic frictional force?
N
A technician wraps wire around a tube of length 39 cm having a diameter of 7.8 cm. what is the self-induced emf in the solenoid
a spaceship flies past earth at a speed of 0.900. a crew member on board the spaceship measures its length obtaining the value 400m
A proton orbits a long charged wire, making 5.66 *106 revolutions per second. What is the wire's linear charge density
a gymnast is performing a floor routine. In a tumbling run she spins through the air, How much time does this maneuver take
The pilot of an aircraft wishes to fly due west in a 33.10 km/h wind blowing toward the south. The speed of the aircraft in the absence of a wind is 190 km/h what must its speed relative to the ground be.
The distance between a node and the nearest antinode of a standing sound wave in air is 8.25 m. obtain the frequency of this wave
A spotlight at the bottom of a pool emits a cone of light upward 22 degrees wide. n= 1.33, How wide (as angle w) is the cone of ligh outside of the pool
A point source of light is submerged 2.4 m below the surface of a lake and emits rays in all directions. What is the maximum radius that this circle could have
A 45cm3 block of iron is removed from an 800?Cfurnace and immediately dropped into 200 mL of 20?C water. What fraction of the water boils away
You are designing a delivery ramp for crates containing exercise equipment. Calculate the maximum force constant of the spring kmax that can be used in order to meet the design criteria
rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 44.1m/s^2. Find the maximum height ymax reached by the rocket
A 1.9 kg object that stretches a spring 8.8 cm from its natural length when hanging at rest oscillates with an amplitude of 6.5 cm, Find the total energy of the system
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