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- A person whose weight is 520 N is being pulled up vertically by a rope from the bottom of a cave that is 35.1 deep. The tension in the rope is 569 N. How long, starting from rest, will it take to bring the person out of the ve?A child of mass 26 kg , is sliding down a water-slide that has an angle of 32 deg. If the water lubricates the slide to a frictionless surface, and the slide is 9 meters long. What is the child's velocity at the bottom?An SUV drives on a straight-line track. Starting with a speed v0 = 14.4m/s, it comes to rest over a distance d = 28.8m Part (a) Write an expression for the magnitude of the net force on a passenger with mass m . If m = 61.3kg, then what is the numeric value, in newtons, for the net force in Part (a)? .
- You are driving a car at a constant speed of 14.0 m/s along a straight level road. As you approach anintersection, the stoplight turns red and you slam on breaks and the wheels lock and you skid to a stop in25.0 m. What is the coefficient of kinetic friction between your tires and the road?kids decide to slide boxes down a long slide. the slide is inclined at 20 degrees and has a coefficient of kinetic friction equal to 0.200. the kids push a 45.0 kg box from the top of the slide so that the initial velocity is 2.25m/s. how far down the reap (in m) will the box go before it stops?Two horses pull a cart with a total applied force of 1000N. The kinetic friction from the gravel road has a value of 375 N. Assuming the cart is 200kg, what is the acceleration of it?The road is flat and the horses are traveling in a straight path.
- Joe pushes down the length of the handle of a 14.1 kg lawn spreader. The handle makes an angle of 47.1° with the horizontal. Joe wishes to accelerate the spreader from rest to 1.39 m/s in 1.7 s. What force must Joe apply to the handle? Answer in units of N.A 0.152 kg ball is attached to a string that is 62.2 cm long. The string will break if subjected to a tension force of 4.8 N. If a small child swings the ball in a horizontal circle around her head, at what velocity will the string break?Jill of the Jungle swings on a vine 7.00 m long. (a) What is the tension in the vine if Jill, whose mass is 65.0 kg, is moving at 3.00 m/s when the vine is vertical? (b) If the maximum tension that the rope can support is 750 N, what is the maximum speed that you can have on the rope?
- Dave with a mass of 60 kg goes tubing down a 20 m long hill that has an angle off the horizon of 25º. (Gravity applies) a. He gets a push from the bottom of the hill, so his initial velocity is 2 m/s. How far up the hill will he go before stopping? (there’s no friction) b. He goes back down the hill and then his friend Jill tries to pull him on the tube across a small patch of grass (μk=0.30). If she is pulling parallel to the ground at constant 5 m/s for 5 sec how much power does she expend? c. After climbing back uphill, Dave decided to roll down the hill instead. If he were to be a long cylinder with a radius of 0.1 m, what is his moment of inertia? d. After rolling without slipping down the hill, what is Dave’s final velocity at the bottom of the hill? What is his angular velocity at the bottom of the hill? Dave with a mass of 60 kg goes tubing down a 20 m long hill that has an angle off the horizon of 25º. (Gravity applies) He gets a push from the bottom of the hill, so his…A train car is accelerating with an unknown acceleration. There is a small mass hanging from a string that is attached to the ceiling of the train car. Because the train is accelerating forward, the mass is angled backwards at 6.4 deg. from the vertical. What is the magnitude of the train's acceleration?A parachutist relies on air resistance to decrease her downward velocity. She and her parachute have a mass of 55kg, air resistance exerts a total upward force of 600N on her and her parachute. What is the acceleration of the parachutist.