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A boy of mass 52.2 kg is initially on askateboard of mass 2.00 kg, moving at a speed of 9.8 m/s. The boy falls off the skateboard, and hiscenter of mass moves forward at a speed of 10.9 m/s. Find the final velocity of the skateboard.
suppose an astronomer decides he wants to know the average orbital speed of eris the dwarf planet. using mechanical and
a proton moves through a magnetic field at 32.5 of the speed of light. at a location where the field has a magnitude of
As a baseball is being caught, its speed goes from 31 to 0 m/s in 0.005 seconds. The mass of the baseball is 0.145 kg. What is the force acting on the ball
A 0.8 kg block is on a surface with negligible friction. When the surface is horizontal, the spring has an equilibrium length of 0.25 mWhen the surface istilted at a 27? angle to the horizontal there is a new equilibrium length of 0.33 m :
A 25g object moving to the right at 20 cm/s overtakes andcollides elastically with a 10.0g object moving in the samedirection at 15cm/s. What is the velocity of each object after collision
Positively charged aluminum ion, Al3+, has a mass of 4:50 1026 kg. After being accelerated through a potential dierence of 650 V, Calculate the radius of the path of the ion in the eld
Consider the particle that is constrained to move along a curve described by y = x4. Find the equation of motion for small displacement about equilibrium
A particular heat engine has a mechanical power output of 6.00 kW and an efficiency of 28.0%, Find the energy taken in during each cycle
The moon's diameter is 3.48 × 106 m, and its mean distance from the earth is 3.85 × 108 m. Find the diameter of the moon's image on the slide film
A simple harmonic oscillator has an amplitude of 3.5cm and a max speed of 28cm/s. What is its speed when the displacement is 1.75cm
A galvanometer has an internal resistance of 100 ? and deflects full-scale at a current of 2.00 mA. how should this resistor be connected to the galvanometer
Find the direction of the net force exerted on the Sun. Give the direction relative to the line connecting the Sun and the Moon
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