A block of weight 4.6 N is at rest on a horizontal table. An upward vertical for

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A block of weight 4.6 N is at rest on a horizontal table. An upward vertical force of 0.3 N is applied to the block by means of a string. What is the magnitude of the force exerted by the block on the table top? The tension at which a fishing line breaks is commonly called the "breaking strength". What minimum breaking strength is needed for a fishing line to stop a salmon that weighs 98.0 N in 13.0 cm if the fish is moving horizontally with an initial velocity of 2.4 m/s? Assume the acceleration is constant. A 87.0 kg skier is pulled up a frictionless ski slope that makes an angle of 5.0 deg. with respect to the horizontal by holding onto a tow rope parallel to the slope. Determine the magnitude of the force exerted by the rope on the skier if the skier is moving with a constant speed of 2.9 m/s? In the previous problem, what would the tension in the tow rope be if the skier were accelerating up the slope at a rate of 0.05 m/s2? A 70.0 kg girl lowers herself to the ground from a height of 9.0 m by holding onto a rope running over a pulley to a 36.0 kg sandbag. What is the magnitude of the acceleration of the girl? In the previous problem, if the girl starts from rest, what is her speed when she reaches the A block of mass m = 4.8 kg is pulled along a horizontal frictionless floor by a string that exerts a force F = 27.0 N at an angle 40.0 above the horizontal. What is the magnitude of the block's acceleration? In the previous problem, if the force applied to the block slowly increases, what is it's value just before the block is lifted completely off the floor? An automobile weighing 2.10xl04 N is moving with an initial speed of 70.0 km/hr along a flat highway. When the brakes are applied, the automobile is brought to rest in 24.0 meters. Assuming that the force that stops the automobile is constant find the magnitude of the applied force? What is the time required to stop the automobile in the previous problem? Which of the following statements are true if the speed of the automobile in the previous problem is doubled and the braking force remains the same? (Give all correct answers, eg. A or BC or ABC ... and do not use commas) Both the stopping distance and time decrease The stopping distance quadruples and the time doubles Both the stopping distance and time remain the same The stopping distance increases

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