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Consult to explore a model for solving this problem. A person pushes on a 60-kg refrigerator with a horizontal force of -250 N; the minus sign indicates that the force points in the -x direction. The coefficient of static friction is 0.66.
(a) If the refrigerator does not move, what are the magnitude and direction of the static frictional force that the floor exerts on the refrigerator?
(b) What is the magnitude of the largest pushing force that can be applied to the refrigerator before it just begins to move? Assume g = 9.8 m/s2.
Without slowing down, she skis off the cliff and lands downhill at a point whose vertical distance is 3.50 m below the edge. Explain how fast is she going just before she lands?
Khristian is a 6-year-old boy who is brought in for evaluation by his parents. The parents are concerned that he has a really deep cough that he just can't seem to get over. The history reveals that he was in his usual state of good health until appr..
A football is thrown toward a receiver with an initial speed of 20 m/s at an angle of 30.0o above the horizontal. At that instant, receiver is 20 m from the quarterback. In what direction and with what constant speed must the receiver run in order..
Suppose a block with mass 2.70 kg is resting on a ramp. If the coefficient of static friction between the block and the ramp is 0.310, Find the maximum static friction force that acts on the block
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Two identical conducting small spheres are placed with their centers 0.330 m apart. One is given a charge of 12.0 nC and the other a charge of 13.0 nC. Find the electric force exerted by one sphere on the other
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A jet airplane is in level flight. The mass of the airplane is m = 8850 kg. The plane travels at a constant speed around a circular path of radius R = 8.23 miles, What is the magnitude of the lift force acting on the plane
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