A 1000 kg car is pushing an out of gear 2000 kg truck that has a dead battery. When the driver steps on the accelerator, the drive wheels of the car push against the ground with a force of 6000 N. Rolling friction can be neglected. Part A What is the magnitude of the force of the car exerted on the truck? Express your answer with the appropriate units. FC on T = Part B What is the magnitude of the force of the truck exerted on the car? Express your answer with the appropriate units. FT on C =
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- THIS QUESTION IS NOT GRADED.A box of oranges with a weight of 87 N is being pushed across a horizontal floor. As it moves, it is slowing at a constant rate of 0.90 m/s each second. The push force has a horizontal component of 20 N and a vertical component of 25 N downward. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Moving the exercise equipment again. Part A Calculate the coefficient of kinetic friction between the box and floor. ΑΣφ ? Uk Submit Request AnswerA woman stands on a scale in a moving elevator. Her mass is 72.0 kg, and the combined mass of the elevator and scale is an additional 815 kg. Starting from rest, the elevator accelerates upward. During the acceleration, the hoisting cable applies a force of 9390 N. What does the scale read during the acceleration? N
- Three blocks rest on a frictionless, horizontal table (see figure below), with m₁ block 1, and the acceleration of all three blocks is found to be 3.2 m/s². (a) Find m₂. m1 kg m₂ m3 = 5 kg and m3 = 14 kg. A horizontal force F = 117 N is applied to (b) What is the magnitude of the normal force between blocks 2 and 3? NA cart of mass 0.85 kg is on a track, connected by a string over a pulley to a hanging mass of 0.1 kg. A friction pad is attached to the bottom of the cart, and you push the cart so that it first moves toward the sensor, then away from the motion sensor. Assuming the magnitude of the force of friction remains constant throughout the entire motion of the cart, the magnitude of the net acceleration of the cart is which of the following? a. larger when the cart is moving towards the motion sensor b. larger when the cart is moving away from the motion sensor c. the magnitude of the acceleration cannot be predictedAP A student, crazed by final exams, uses a force P of magnitude P and angle 0 to push a block of mass m across the ceiling of his room, as in the figure. If the coeffcient of kinetic friction between the block and the ceiling is µk, what is the magnitude of the block's acceleration? NOTE: Express your answer in terms of the given variables, and g. |ā|
- A 2.50-kg object is moving in a plane, with its x and y coordinates given by x = 6t² - 2 and y = 5t³ + 1, where x and y are in meters and t is in seconds. Find the magnitude of the net force acting on this object at t = 1.60 s. NA cardboard box rests on the floor of an elevator. The box has a mass m = 2.75 kg and the elevator has an upward acceleration of a. a. Write an expression for the sum of the forces acting on the box in the y-direction, ΣFy, given that up is the positive y-direction. Your answer should be in terms of FN, m, and g. b. Write an expression for the normal force, FN, that the block experiences in terms of the elevator's acceleration, the block's mass, and the acceleration of gravity. c. If the elevator's acceleration has a magnitude of g in the downward direction, what would the normal force, FN1 be in Newtons? d.If the elevator's acceleration had a magnitude of g in the upward direction, what would the normal force FN2 be in Newtons?A teenager of mass m1 = 56 kg pushes backwards against the ground with his foot as he rides his skateboard. This exerts a horizontal force of magnitude F foot = = 18.5 N. The skateboard has m2 = 2.6 kg. a. Write an expression for the magnitude of the horizontal component of force that the ground exerts on the teenagers foot, F ground. b. Write an expression in terms to given quantities for the magnitude of the skateboard acceleration, a , while the teenager is pushing backwards on the ground? c. What is the numerical value of the magnitude of the acceleration, a, in m/s square?
- Newton's first law states that: Group of answer choices Ia. n the absence of any net force acting on it, a mechanical system is necessarily at rest. b. In the absence of a non-zero net force acting on it, a mechanical system keeps moving in the same direction at the same speed (including the case v=0). c. For any pair A/B of objects interacting with one another, the force of A acting on B is the equal-opposite of the force of B acting on A. d. The rate of change of the velocity of a system is proportional to the net force acting on it.A1 kg cart is connected to a 2 kg cart. The 1 kg cart feels 9 N of friction and the 2 kg cart feels 18 N of friction. If you pull on the 2 kg cart with a force of 36 N to the right. what is the force of tension between the two carts?A 1800 kgkg car starts from rest and drives around a flat 50-mm-diameter circular track. The forward force provided by the car's drive wheels is a constant 1000 NN . Part A What is the magnitude of the car's acceleration at t=13st=13s? Express your answer to two significant figures and include the appropriate units. aa =