Study 1 For all 3 trials of Study 1, čI had a mass of 1.0 kg. However, the mass of C2 was varied from trial to trial. At the start of each trial, Ct and C2 were at rest, separated only by a spring that was compressed. The amount of com- pression was the same for each trial. When the spring was released, the expanding spring caused the carts to move in opposite directions (see Figure 1). compressed spring cart C1 C2 spring released C2 top view Figure t The students measured the speed, in m/sec, of each cart, and then calculated P of each cart (sce Table 1). Table 1 Speed (m/sec) P Mass of C2 (kg m/sec) Trial (kg) C1 C2 C1 C2 1.0 2.0 3.0 0.104 0.116 0.120 0.104 0.062 0.041 0.10 0.12 0.12 0.10 0.12 0.12 -23

*28 In Fig. 4-34, a stone is pro- jected at a cliff of height h with an initial spccd of 42.0 m/s dirccted at angle 6= 60.0 above the horizontal. The stone strikes at A, 5.50 s after launching. Find (a) the hcight h of the cliff. (b) the speed of the stone just before impact at A, and (c) the maximum height II reached above the ground. Fig. 4-33 Problem 27. Fig. 4-34 Problem 28.

Block A is initially held at rest. Find how far it will descend before its velocity is momentarily zero. (This is different from finding the point where there would be equilibrium).

In a conceptual design, the power to move a bus comes from the energy stored in an onboard rotating flywheel. The flywheel has a mass of 1500 kg, a radius of gyration of 500 mm, and is brought to a maximum speed of 4000 rpm. If the bus starts from rest and acquires a speed of 72 kph at the top of a hill 20 m above the starting position, find the reduced speed of the flywheel. Assume 10% of the energy of the flywheel is lost due to frictional effects. Neglect the energy of the bus contained in the rotation of the wheels. The bus with flywheel is 10,000 kg. H Type here to search ThinkVision Esc @ 2 W F1 # 3 O E $ 4 F3 R % 5 F4 A 6 A F5 28 7 F6 8 F7 ( 9 F8 0 Fe F10 F11 F12 Backspace Prirk Scroon Sys Piq Insert Scroll Lock 00 Home Pause Break Page Up Man Lock 13000 37°F Cloudy (10) F 2:12 PM 4) 11/16/202 Lenovo

Q3 out of 11 A block B of mass m (see Figure 1) can slide freely on a frictionless arm OA which rotates in a horizontal plane at a constant rate Bis from O. Draw a complete kinetic diagram. How many vectors do you have in your diagrams? (enter in space) Figure 1: Swing

A steel ball of mass M is held at a distance H above a massless rigid tabletop supported by undamped springs whose equivalent stiffness is K. If the ball is left to fall from rest on the tabletop. Deduce an expression for the velocity at which the ball will bounce back off the tabletop. On its way back, will the mass bounce back to its initial height? If it will not, where will the difference in energy go? Discuss mathematically! (Pls solve the question in detail with figure)

Problem 1. Find the horizontal force magnitude P needed to start the motion of the block with mass mo in two scenarios: (a) when P is applied to the right and (b) when P is applied to the left. Develop a general solution for each scenario, and subsequently, substitute the values 0= 25°, m = mo = 2.5 kg, µs = 0.40, and μk = 0.35 into your expressions for evaluation. Hgs H k P (a) A mo 0 m P (b) B

Q.3 (a) In Figure Q.3(a), a 2000 kg truck is traveling at 15 ms' when the brakes on all its wheels are applied, causing it to skid for a distance of 10 m before coming to rest. The total mass of the boat and trailer is 1200 kg. (i) Determine the acceleration of the system. (ii) Draw the free body diagram and kinetic diagram for both the truck and trailer. (iii) Based on the diagrams in (ii), determine the horizontal force developed in the coupling, C, and the frictional force developed between the tires of the truck and the road during this time. Boat and trailer Truck Figure Q.3(a) EKN

H.W. * A car of total mass 1140 kg has roadwheels of effective diameter 0.7 m and attains a speed of 120.7 km/h at an engine speed of 3600 rev/min Calculate the final drive ratio, tractive effort and the brake power developed by the engine, assuming a transmission efficiency of 90% .

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