2. Determine the velocity of the 60-lb block A if the two blocks are released from rest and the 40-lb block B moves 2 ft up the incline. The coefficient of kinetic friction between both blocks and the inclined planes is u = 0.10. %3D Use Constraint Equations (for pulley), Equation of Motion (Newton's second law), and the Principle of Work and Energy. NOT allowed to use Chegg or other such websites. NOT allowed to use Chegg or other such websltes. B 30 60
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- A sports car with a mass of 1,385 kg is at rest on a flat, horizontal road. 5.4 s later, that car is moving forward at a speed of 90 mph. Calculate the acceleration of the car and the average net force acting on the car. For this problem Draw an Energy Bar Chart to solve the problem using the Work-Energy Theorem. W = ½ mv^2 - ½ mvo^2Please help thank u2. Energy Nonconservation A mass m, = 1.00-kg is sitting on a plane inclined at an angle of 0 = 60° from the horizontal and is also attached to a pulley which connects m, to freely hanging mass m2 2.00-kg. The coefficient of kinetic friction between m, and the incline is u = 0.27. Assuming the masses are released from rest, use work/energy arguments to find their final speed after they travel for a distance d = 1.00-m.
- 1. What is the net work of a system if there is an applied force pushing it at a value of 6703.03N at a distance of 65.42m if there is a resisting force caused by the surface of a floor having a coefficient of kinetic friction value of 0.05 ? The mass of the object is 116.76. What is the final velocity of the object upon reaching the last point of the distance covered? Express work in proper scientific notation.7. A small block of mass m starts from rest and slides along a frictionless loop-the-loop as shown in the figure. What must be the initial height z, so that m pushes against the top of the track at point a with a force of magnitude equal to F₂?2. Page 2 > of 7 F=40 30 In this problem, the block moves in the horizontal direction only. A. Find the work done if the force is applied for a distance of d = 2 m. B. If the mass is m= 6 kg and the initial velocity is V- 0. Use the work-energy theorem to find the final velocity C. If the process in part (B) took a time of t = 0.8s, use your answer from part (B) to Calculate the acceleration of the block. D. Now use Newton's second law ( in the x-direction) to calculate the acceleration. Your answers from Part ( C) and ( D) should be pretty close. They're different Because of rounding errors. dy
- 8. You are working on a design for a runaway truck ramp as indicated in the figure below. The hill is covered in gravel so that the truck's wheels will slide up the hill instead of rolling up the hill. The coefficient of kinetic friction between the tires and the gravel is uz. This design has a spring at the top of the ramp that will help to stop the trucks. This spring is located at height h. The spring will compress until the truck stops, and then a latch will keep the spring from decompressing (stretching back out). The spring can compress a maximum distance xmax because of the latching mechanism. Your job is to determine how strong the spring must be. In other words, you need to find the spring constant so that a truck of mass m, moving at an initial speed of |3ol, will be stopped. a. Draw energy bar diagrams for whatever system you are using both at the initial time and the final time (when the spring is completely compressed). spring gravelA 2000-kg airplane is coming in for a landing, with a velocity 5 degrees below the horizontal and a drag force of 40 kN acting directly rearward. Kinetic energy will ____ due to the net force of ____. a. increase, 20 kN b. decrease, 40 kN c. increase, 45 kN d. decrease, 45 kNPlease answer and solve the question correctly. Thank you!!
- 5054. The power provided by a force can also be written as P = dW /dt = F · d7/dt = F .ö. A force F = (3i – 2j + 6k)N is applied to an object moving with a velocity i = (2î – 3k) m/s. a. What is the power provided by this force? Does the object speed up or slow down or neither, if this force is the only unbalanced force acting on the object? b. Consider a force that is always perpendicular to the velocity. Does the object speed up or slow down or neither, if this force is the only unbalanced force acting on the object?5) A brick is moving on a rough level surface. It has 24 J of kinetic energy, and the friction force on it is a constant 0.50 N. What is the maximum distance it can slide? A) 24 m B) 2.0 m C) 48 m D) 12 m 6) The kinetic friction force that a horizontal surface exerts on a 60.0-kg object is 50.0 N. If the initial speed of the object is