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a tennis ball of mass o.022 kg is moving at 3.1 m/s at anangle of 222 degrees to the horizontal. it is struck by a tennisracket which exerts a force on it of 73t - 442t 2 N. for one tenth of a second at an angle of 32degrees to thehorizontal. find the final velocity of the tennis ball. (expressyour answer using i and j unit vectors)
A baseball pitcher can throw a ball with a speed of 40m/s . He is in the back of a pickup truck that is driving away from you. What is the speed of the truck
A lunar lander is landing on the moon from 5.0 m above the surface, with a downward speed of 0.8 m/s. With the engine off, it is in free fall. find the speed of the lander just before it hits the surface
wo point charges are located as shown in the figure, with charge q1 = +1.6 C at x = ?3.0 m, y = 0, How much work must be done on the electron to move it to the origin
A spring is stretched a distance of Dx = 40 cm beyond its relaxed length. Attached to the end of the spring is an block of mass m = 12 kg, which rests on a horizontal frictionless surface. what is the speed of the attached object
q1. a 25- sample of an ideal gas with is at 250 and 50. the gas is compressed isothermally to one-third of its original
A person with mass m1 = 60 kg stands at the left end of a uniform beam with mass m2 = 107 kg and a length L = 3.5 m. What is the location of the center of mass of the system
A speedboat starts from rest and accelerates at +2.01 m/s2 for 6.80 s. At the end of this time, Find the total displacement of the boat
A flat coil of wire has an area A, N turns, and a resistance R. It is situated in a magnetic field, such that the normal to the coil is parallel to the magnetic field. What is the magnitude of the magnetic field
q1. a small wooden block with mass 0.900 is suspended from a lower end of a light cord that is 1.50 long. the block is
In order to find the density of an unknown material Susan measured the mass of a cube made out of this material and the length of its side
The magnitudes of the four displacement vectors shown in the drawing are A = 11.0 m and is 20 degrees N of West, Determine the magnitude and directional angle for the resultant
Astronomers measure the width of the spectral lines of a star to be much wider than would be measured in a laboratory. Give two stellar characteristics that could produce this widening
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