Chapter 13, Problem 126P

A 8.7-Mg truck is resting on the deck of a barge which displaces 235 Mg and is at rest in still water. If the truck starts and drives toward the bow at a speed relative to the barge vrel = 7.5 km/h, calculate the speed v of the barge. The resistance to the motion of the barge through the water is negligible at low speeds.

A 10.1-Mg truck is resting on the deck of a barge which displaces 209 Mg and is at rest in still water. If the truck starts and drives toward the bow at a speed relative to the barge Vrel = 7.8 km/h, calculate the speed v of the barge. The resistance to the motion of the barge through the water is negligible at low speeds. 209 Mg Answer: v= i 7.8 km/h 10.1 Mg km/h

A two-engine jet transport has a loaded weight of 94000 Ib and a forward thrust of 8770 Ib per engine during takeoff. If the transport requires 6020 ft of level runway starting from rest to become airborne at a speed of 145 knots (1 knot = 1.151 mi/hr), determine the average resistance R to motion over the runway length due to drag (air resistance) and mechanical retardation by the landing gear. Answer R = i Ib

The 12-Mg truck drives onto the 203-Mg barge from the dock at 28 km/h and brakes to stop on the deck. The barge is free to move in the water, which offers negligible resistance to motion at low speeds. Calculate the speed of the barge after the truck has come to rest on it. 28 km/h 203 Mg 12 Mg Answer: v = i km/h

Packages having a mass of 4-kg are delivered from a conveyor to a ramp with a velocity of v = 0.8 m/s. What is the velocity in which the packages will leave the ramp (at point B)? Consider e =30° andh = 12 m. The coefficient of the kinetic friction between the package and the ramp is = 0.35 Note. Please write your final answer in m/s in the provided box. Report your answer in 2 decimal places. For example: 2.34 m/s 0.8 m/s

Items in parentheses are the sol

= Q1: The 1.5-kg ball is given an initial velocity VA 2.5 in the vertical plane at position A, where the two horizontal attached springs are unstretched. The ball follows the dashed path shown and crosses point B, which is 12 cm. directly below A. Calculate the velocity of the ball at B. Each spring has a stiffness of k = 1 ª N m VA 30 cm 30 cm 12 cm A UB B Fig. 1

The roller coaster car has a mass of 900 kg, including its passenger. It starts from the top of the hill A with a speed VA = 4.1 m/s. Neglect friction, the mass of the wheels, and the size of the car. Take på = 7.5 m and pc = 5 m. (Figure 1) Figure 15 m B 10 m 1 of 1 Part A Determine the minimum height h of the hill crest so that the car travels around the inside loops without leaving the track. Express your answer to three significant figures and include the appropriate units. h = Submit Part B NB = Value O μA Request Answer What is the normal reaction on the car when the car is at B? Express your answer to three significant figures and include the appropriate units. ▬▬ μĂ Units Value Units ? ?

A bicycle and a rider of mass 90 kg are travelling at the rate of 15 km/hr on the level road. A brake is applied to the rear wheel which 0.70 m in diameter and this is only resistance acting. How far will the bicycle travel and how many turns will its wheel make before it comes to rest? The pressure applied on the brake is 100 N. Take µ = 0.06.