
College Physics
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Suppose you use an ideal pulley of the type shown in Figure 5.18(a) to support a car engine of mass 110 kg.
What force must the ceiling supply, assuming you pull straight down on the rope? Neglect the pulley system's mass.
N (upward)

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- a. Calculate the force (in N) needed to bring a 950 kg car to rest from a speed of 80.0 km/h in a distance of 110 m (a fairly typical distance for a non-panic stop). b. Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 2.00 m. Calculate the force exerted on the car and compare it with the force found in part (a). force in (b)/force in (a)=arrow_forwardIn the figure the pulley has negligible mass, and both it and the inclined plane are frictionless. Block A has a mass of 1.3 kg, block B has a mass of 2.2 kg, and angle 0 is 32°. If the blocks are released from rest with the connecting cord taut, what is their total kinetic energy when block B has fallen 28 cm? Number Units Barrow_forwardA box is motionless, sitting on a ramp with an incline of 0 =54.4 ° being pulled in the direction up the ramp by a spring with a spring constant of k=150 N/m that is stretched x=6.4 m. The coefficient of friction between the ramp and the box are u s=0.53 and u k=0.15 and the friction force is going down the ramp. What is the mass of the box? Solve symbolically: Solve numerically: m= Units: If the box starts moving up a ramp with an acceleration of a=2.41 m/s, what is the new length that the spring will stretch? Solve symbolically: Solve numerically: Units:arrow_forward
- Consider a system of a cliff diver and the earth. The gravitational potential energy of the system decreases by 23,000 J as the diver drops to the water from a height of 44.0 m. Determine her weight in newtons. Narrow_forwardHello please help with physics qarrow_forwardF1 Z Problem 7.65 You are an industrial engineer with a shipping company. As part of the package-handling system, a small box with mass 1.50 kg is placed against a light spring that is compressed 0.280 m. The spring, whose other end is attached to a wall, has force constant k = 48.0 N/m. The spring and box are released from rest, and the box travels along a horizontal surface for which the coefficient of kinetic friction with the box is μ = 0.300. When the box has traveled 0.280 m and the spring has reached its equilibrium length, the box loses contact with the spring. 12.772 ' 2 F2 W S A X command 10 # 3 80 F3 E D C $4 888 F4 R F APR 28 % 5 V T G 6 What is the speed of the box at the instant when it leaves the spring? Express your answer with the appropriate units. 45 HÅ 1 www ? V= Value Units You have already submitted this answer. Enter a new answer. No credit lost. Try again. Submit Previous Answers Request Answer Part B. What is the maximum speed of the box during its motion?…arrow_forward
- Calculate the force needed to bring a 900 kg car to rest from a speed of 90.0 km/h in a distance of 110 m (a fairly typical distance for a nonpanic stop).N(b) Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 2.00 m. Calculate the force exerted on the car and compare it with the force found in part (a), i.e. find the ratio of the force in part(b) to the force in part(a).(force in part (b) / force in part (a))arrow_forwardAs shown in figure, find that at what distance body A will attain a velocity of 3 m/s when starts from rest.Assume the coefficient of Friction as 0.2 and pulleys are frictionless and weightless.arrow_forwardConsider a box, of mass 5 kg, being pushed along a horizonal surface a distance of 2.9 m in 16.2 seconds. The applied force is 165.7 N and is directed at an angle 0.7 radians as shown in the diagram below. What is the power exerted while moving the object?arrow_forward
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