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Say you have a 10 kg book sitting on a table. You pick that book upand place it 3 m below on the ground. What is the work done by youon the book and what is the work done by gravity on the book?
As two boats approach the marina, the velocity of boat 1 relative to boat 2 is 2.13 m/s in a direction 40.3° east of north. What is the direction of the velocity of boat 2
A 0.25 kg block attached to a spring of spring constant 36.5 N/m is oscillating on a horizontal frictionless surface as shown. What is the amplitude of the motion of the block
A spherical weather balloon is filled with hydrogen until its radius is 3.10 m. What is the net force acting on the balloon and its instruments after the balloon is released from the ground?
A cardinal (Richmondena cardinalis) of mass 4.10×10^-2 kg and a baseball of mass 0.144 kg have the similar kinetic energy. What is the ratio of the cardinal's magnitude pc of momentum to the magnitude pb of baseball's momentum.
A high-speed photograph of a club hitting a golf ball is shown in the figure below. The club was in contact with a ball, initially at rest, for about 0.0038 s. If the ball has a mass of 55 g and leaves the head of the club with a speed of 2.5 102 ft/..
A block of mass 20kg is sliding down an incline plane with no friction. Find the normal force and the acceleration of the object
In the reference frame of the laboratory, a particle moves in the x-y plane with a velocity of 0.7c at an angle of 40 degrees with the x-axis. Find the velocity (magnitude and direction) of this particle
two tiny conducting spheres are identical and carry charges of -20.2c and 54.8c. they are separated by a distance of
Batman throws a bat grenade at an angle of 44 degrees to the horizontal with a speed of 17.80 meters per second. How far does it travel.
A 100 g aluminum calorimeter contains 250 g of water. The two substances are in thermal equilibrium at 10°C. Determine the specific heat of the unknown second sample
An exoplanet of mass 7.4e26 kg orbits its parent star at an angle of inclination of 28.9 degrees. determine the period of the exoplanet in days
A large storage tank, open to the atmosphere at the top and filled with water, calculate The diameter of the hole
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