How can you define impulsive force in terms of momentum.

An engineer wants to design a pendulum which consists of a uniform slender rod and a disk with a mass of m, (kg) and m2 (kg), respectively as shown in Figure 3.2. If the angular velocity w of the pendulum is 18.2 rad/s when it is released at rest from t= 0 s to t =4 s, suggest the mass of m, kg and m, kg of the slender rod and disk that he should use in his design. Noted that this pendulum will be subjected to a torque at M = (10t²)N. m and a constant force of F= 40 N (which is always normal to the rod) and the motion of the pendulum is in the horizontal plane. F = 40 N 0.84 m 1 m 0.35 m G M = (10t²)N. m kg = 0.5 m Figure 3.2 A pendulum

In thermodynamics, throttling valves and turbines can be analyzed as steady flow devices. Common assumptions in the analysis of these devices include adiabatic process and negligible changes in kinetic energy and potential energy. Describe one difference between the throttling valve and the turbine. Q2 (a) (b) Air undergoes an adiabatic throttling process with negligible changes in kinetic energy and potential energy. If the temperature of the air remains constant during this process, does this process violates the first law of thermodynamics? Explain your answer. An ideal gas enters a turbine with a velocity of 40 m/s through an inlet pipe with a diameter of 160 mm. The ideal gas enters the turbine at a temperature of 660°C and a pressure of 800 kPa. The ideal gas leaves the turbine with a velocity of 150 m/s through an outlet pipe with a diameter of 100 mm. The power output from the turbine is 350 kW. The heat lost from the turbine to the surrounding amounts to 6% of the power output…

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A car traveling at 26.0 m/s hits a bridge abutment. A passenger in the car, who has a mass of 54.0 kg, moves forward a distance of 63.0 cm while being brought to rest by an inflated air bag. Assuming that the force that stops the passenger is constant, what is the magnitude Fof this force? F

What’s the correct answer for this please ?

(a) An automobile having a mass of 900 kg initially moves along a level highway at 100 km/h relative to the highway. It then climbs a hill whose crest is 50 m above the level highway and parks at a rest area located there. For the automobile, determine its changes in kinetic and potential energy, each in kJ. For each quantity, kinetic energy and potential energy, specify your choice of datum and reference value at that datum. Let g = 9.81 m/s².

To be able to use the conservation of energy on a moving body to determine key characteristics about the mechanics of the system. A package of mass m= 1.00 kg is pushed across the surface by a jet of compressed air during an assembly-line process. The package is moved through a distance of s = 47.0 cm. The package and the surface are known to have a coefficient of kinetic friction of μk= 0.15. The package is initially at rest for this process.     If the package must be moving at a speed of v = 17.0 cm/s when it has reached the distance of 47.0 cm, determine the average force that the jet of compressed air must supply to the package If it is now desired that the package be at rest when it has reached the distance of 47.0 cm , determine the average force that the jet of compressed air must supply to the package if the package is initially traveling in the s direction at a velocity of v = 13.5 cm/s If the plant has changed the mass of the package on the assembly line to m = 1.35 kg ,…

A 28-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 220 J from 420 J. How high does she rise during this interval? Neglect air resistance.

(a) During the packaging process, a can of soda of mass 0.4 kg moves down a surface inclined 20° relative to the horizontal, as shown in the figure below. The can is acted upon by a constant force R. parallel to the incline and by the force of gravity. The magnitude of the constant force R is 0.05 N. Ignoring friction between the can and the inclined surface, determine the can's change in kinetic energy, in J, and whether it is increasing or decreasing. If friction between the can and the inclined surface were significant, what effect would that have on the value of the change in kinetic energy? Let g = 9.8 m/s² Final location Soda 20° m=0.4 kg- 1.5 m ↓ Initial location Soda R = 0.05 N Soda