Recent content by pulau_tiga

Hi, I'm having some difficulty getting the correct answer for a problem relating to wave superpositiong. Question: Two waves in one string are described by the wave functions y1 = 3.15 cos (3.65x - 1.40t) and y2 = 4.10 sin (5.05x - 2.20t) where y and x are in centimeters and t is in...

I am having troubles with this physics question, I'm not really sure on how to set it up and everything. question: A mass M of 3.60×10-1 kg slides inside a hoop of radius R=1.20 m with negligible friction. When M is at the top, it has a speed of 5.33 m/s. Calculate size of the force with...

Hi. I was wondering if anyone could help me out in this question: A mass M is sliding down the inclined plane at a speed of 2.13 m/s. The mass stops a distance of 2.45 m away from the base of the inclinde, along a flat surface. The mass slides 1.24 m down the incline before reaching the...

Hi, I am having diffculty with a physics problem. If anyone could help me out it would be greatly appreciated. Question: One end of a long elastic cord is tied to the railing of a high bridge. The other end is tied to a sandbag with a mass of 23.2 kg. The unstretched length of the...

Hi. I have a physics question. I cannot get the right naswer. The question: Three boxes rest side-by-side on a smooth horizontal floor. Their masses are 1.10 kg, 3.45 kg, and 5.55 kg, with the 3.45 kg one in the center. A horizontal force of 20.0 N pushes on the 1.10 kg mass which...

Inclided plane Hi! I have a physics question. A block with mass m=14.7 kg slides down an inclined plane of slope angle 44.4* with a constant velocity. It is then projected up the same plane with an initial speed 2.55 m/s. How far up the incline will the block move before coming to rest...

Find the constants a and b such that the function is continuous on the entire real line: f(x) = {e^ax , x < or = to 1 ; 2x+b, x >1 I found the limits as x approaches 1 from the left and the right. and set the two equations equalling each other e^a = 2+b However, I do not know what...

Hi! I'm working on a circular motion problem, and I'm not sure on how to go about doing it. The question: A spacecraft moves in a circular orbit with a speed of 7360 m/s with a period of 6270. seconds. The radius of the spacecraft 's orbit is 7.34 x 10^6 m and the radial acceleration...

Thank you so much, Marlon. It was greatly appreciated.

**Correction: The car reaches its final velocity when it is 1480 m away from the lights. (not 1450 m)

Hello, I'm having some difficulty in a physics question. The question is: To save fuel, some truck drivers try to maintain a constant speed when possible. A truck traveling at 81.0 km/h approaches a car stopped at the red light. When the truck is 94.6 meters from the car the light turns...

Okay. I know that a=-9.8 m/s; and d= 20.m but I don't know if Vf = 0... I think it might, but I'm not sure. If it does = 0 then I think I can do... Vf2 = Vi2 +2ad 0 = Vi2 +2ad -2ad = Vi2 -2(-9.8)(20.) = Vi2 390 m2/s2 = Vi2 Vi=20. m/s but I don't know if Vf = 0 or not. my answer seems...

can you please help me with this question. I really am stumped, on how to get the initial velocity. A ball player hits a home run and the baseball just clears a wall 21.0 m high located 130 m from home plate. (assume max height of the ball is 21.0 m) The ball is hit at an angel of 35.0* to...