A vehicle of mass 700kg is on a smooth horizontal plane. The brakes are applied when his speed is 72km/h and the vehicle stops after traveling 50m. Determine the intensity of the force exerted by the brakes

A vehicle of mass 700kg is on a smooth horizontal plane. The brakes are applied when his speed is 72km/h and the vehicle stops after traveling 50m. Determine the intensity of the force exerted by the brakes

Classical Dynamics of Particles and Systems

5th Edition

ISBN:9780534408961

Author:Stephen T. Thornton, Jerry B. Marion

Publisher:Stephen T. Thornton, Jerry B. Marion

Chapter13: Continuous Systems; Waves

Section: Chapter Questions

Problem 13.9P

See similar textbooks

Similar questions

An X-ray machine makes an image of the internal organs by exposing the human body to the electromagnetic radiation with the wavelength of 10^-10 m. We call this electromagnetic radiation X-rays. Assuming that the speed of light is 3x10^8 m/s, what is the frequency of oscillations of the X-rays? Express your answer in Hertz (Hz).
A body of mass (m) performing UCM with frequency (n) along the circumference of circle having radius (r), force is given by, (a) 4r n m² (b) 4 πη?mr 1 (c) T² n² mr (d) , T n m? 2
4. An electromagnet weighing 3,000 lb is at rest while holding an automobile of weight 2,000 lb in a junkyard. The electric current is turned off, and the automobile is dropped. Assuming that the crane and the supporting cable have an equivalent spring constant of 10,000 Ib/in.,find the following: (a) the natural Time period of vibration of the electromagnet, (b) the resulting motion of the electromagnet, and (c) the maximum tension developed in the cable during the motion Ans: T= 0.175 s, u(t)-0.2 Cos (35.92t), T= 5000 Ib max
5-23. If the roller at A and the pin at B can support a load up to 4 kN and 8 kN, respectively, determine the maximum intensity of the distributed load w, measured in kN/m, so that failure of the supports does not occur. 30° B 3 m - 4 m-
15-61. The 15-kg block A slides on the surface for which Hx = 0.3. The block has a velocity v = 10 m/s when it is s = 4 m from the 10-kg block B. If the unstretched spring has a stiffness k = 1000 N/m, determine the maximum compression of the spring due to the collision. Take e =0.6. 10 m/s -k = 1000 N/m
A bat flying at 5.05 m/s is chasing an insect flying in the same direction. The bat emits a 39.8-kHz chirp and receives back an echo at 40.6 kHz. (Take the speed of sound in air to be v = 343 m/s.) (a) What is the speed of the insect? m/s(b) Will the bat be able to catch the insect? Yes No Explain.
Question 2 a) A laminar boundary layer profile may be assumed to be approximately of the form u/Ue= f (n)=f(y/8) i) Use an integral analysis with the following two-segment velocity profile, ƒ (n)=(n/6)(10–3n−1³), for 0≤7≤0.293 and ƒ (7) = sin (л7/2) for 0.293≤n≤1, to find expressions for the displacement thickness &*, the momentum thickness e, the shape factor H, the skin-friction coefficient c, and the drag coefficient CD. ii) Derive an expression for the velocity normal to the stream wise direction given that, u/U₂ = f(n). iii) Hence obtain the velocity normal to the stream wise direction for the above two- segment velocity profile.
A 3 kg weight is attached to a spring with constant k = 27 kg/m and subjected to an external force F(t) = – 21 sin(4t) . The weight is initially displaced 2 meters above equilibrium and given an upward velocity of 5 m/s. Find its displacement for t > 0, with y(t) measured positive upwards. y(t) %3D
Q24
Problem 23: A firefighter, whose mass (including clothing and equipment) is m=�=89 kg, hears the alarm and slides down the pole with a constant downward acceleration of magnitude a=�=3.51 m/s2m/s2. Part (c) What is the magnitude, in newtons, of the force F�?
At one instant, a mass (m = 1.3 kg) is at the location m and attached to one end of a spring with a spring stiffness kg = 60 N/m and a relaxed length Lo = 0.22 m. The origin is located where the other end of the spring attaches to the ceiling. (a) Determine the force acting on the mass due to the spring. = N spring (b) Determine the net vector force acting the mass. net = N
A building in San Francisco has light fixtures consisting of small 2.35-kgkg bulbs with shades hanging from the ceiling at the end of light thin cords 1.50 mm long. If a minor earthquake occurs, how many swings per second will these fixtures make? Express your answer with the appropriate units.