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1. A 64.0-kg person holding two 0.750-kg bricks stands on a 2.20-kg skateboard. Initially, the skateboard and the person are at rest. The person now throws the two bricks at the same time so that their speed relative to the person is 15.0m/s .
a) What is the recoil speed of the person and the skateboard relative to the ground, assuming the skateboard moves without friction?
A cylinder of mass 8.0 kg rolls without slipping on a horizontal surface. At a certain instant its center of mass has a speed of 11.0 m/s. Determine the translational kinetic energy of its center of mass
An insect with many legs is scuttling across the floor. Assume that each leg pushes with the same force at exaclty the same spot. What is the insects acceleration in terms of gravity
what is the kinetic energy of a ball of mass 16.1 kg at the apex (highest point) of its trajectory, if it is thrown with an initial speed of 45 mph
A ball of mass 0.55 kg moves around a vertical circle of radius 1.2 m. Find the tension of the string T
a chartered airplane flies 100 km east, then 350 km north west, and then 150 km at 30 degrees west of south. determine the direction of the last leg of the journey
a positive charge of -4 microcoulombs is llocated at the center of a spherical shell of inner radius 2cm and outer radius 3cm, what is the total charge on he inner shell
a sodium atom emits a photon with wavelength 818 nm shortly after being struck by an electron
A weather vane initially at rest has a moment of inertia of 0.116 kg · m2 about its axis of rotation. Find the angular velocity of the weather vane just after it is struck
If an astronaut dropped a small rock near the surface of Pluto, how far (in m) would the rock fall in 2.4 s
A dentist uses a mirror to examine a tooth. The tooth is 1.01 cm in front of the mirror, and the image is formed 10.9 cm behind the mirror. Determine the mirror's radius of curvature
nozzle of a hose is pointing straight up. the water rises to a height h above nozzle openig. how high does the water rise
two point charges each have a value of 30.0 mC, compute the electric field midway between the two charges
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