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A 0.21 kg particle moves along an x axis according to x(t) = - 11 + 3 t + 5 t^2 - 5 t^3, with x in meters and t in seconds. What are projections of the net force acting on the particle at t = 3.2 s on (a)x-axis, (b)y-axis, (c)z-axis?
bjorn is standing at x1 550 m. firecracker 1 explodes at the origin and firecracker 2 explodes at x2 850 m. the
Slamming on the brakes, a driver decelerates her car from 25.0 m/s to 15 m/s in 3.5 s. Find her average speed assuming the acceleration was unifrom.
A student throws a set of keys vertically upward to his fraternity brother, who is in a window 3.60 m above. With what initial velocity were the keys thrown
Tendons are strong elastic fibers that attach muscles to bones. To a reasonable approximation, they obey Hooke's law. Find the force constant of this tendon in N/m
A puck of mass 80.0 g and radius 4.30 cm slides along an air table at a speed of 1.50 m/s, What is the Angular Speed about the center of mass
A wooden plank is raised at one end to make an angle of 30° to horizontal. determine the rate of acceleration down the incline
In a head on collision, a car stops in .10 seconds from a speed of 14 meters per second. The driver has a mass of 70 kg, and is, fortunately, tightly strapped into his seat. What force is applied to driver by his seat belt during that fraction of ..
Hydraulic engineers often use, as a unit of volume of water, the "acre-foot", What volume of water, in acre-feet, fell on the town
Vertically polarized light with an intensity of 0.40 W/m2 passes through a polarizer whose transmission axis is at an angle of 55 degrees with the vertical
A platinum resistance thermometer has resistances of 200.0 ? when placed in a 0?C ice bath and 253.8 ?, What is the melting point of potassium
demonstrate that the ground state wave function of a particle in an infinitely deep box is an eigenfunction of the
If the original force between two objects is 0.86N, and the distance is tripled, what is the new gravitational force between the objects
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