physics

  1. R

    Hi ive got to do a Physics presentation on glass fibre in sailing boats and need

    If you wished to demonstrate the technical attributes of the material you could ask what it is that makes Fibreglass construction so useful in boat building in the first place - one issue is the ability to copy in general terms any type of hull and shape. And once a mold is made the ability to...
  2. H

    The physics behind an SUV crash?

    can someone please tell me the physics behind an SUV crash? i know that SUV's are prone to roll overs, but i need equations and the physics behind it. Like, force is exerted on the passenger because of the weight of the car, and stuff. Thankkkk you.
  3. J

    Physics car-truck collision (fun problem)?

    A blue car with a mass of mcar = 2020 kg and a yellow truck with mass mtruck = 9110 kg enter an intersection. The truck comes from the south at vtruck = 7 m/s, and the car comes from the west. When the two collide they stick together and slide at an angle of q = 42° north of east. What is the...
  4. M

    Particle Physics has become my religion. Does anyone else believe that "god" is

    Particle Physics has become my religion. Does anyone else believe that "god" is in the subatomic interactions? I'm not just talking about Einsteinian physics, but post-Einsteinian quark-theory and the like. (For those not of the geek set) If we are not as solid as we think and we are...
  5. I

    I want to pick up astronomy an astronomical physics as a hobby...?

    I want to know which books I can pick up to help me with the physics and a good telescope for just stargazing. Help? I'm on a budget and I have prior knowledge with physics.. thanks?
  6. T

    Physics problem: How much thrust does it take to get a satellite out of earth orbit?

    How would you calculate the impulse required to propel a small satellite out of orbit and into space? Clarification: Let's assume the target is the moon.
  7. E

    i need a quote or a funny greeting to say to my physics professor, something

    related to physics plz? on his birthday
  8. K

    Physics help: My friend rides on the back of a truck that's going away from

    me at 25 km/hr. After the truck? passes, he throws a ball toward me at 55 km/hr relative to him. How fast is the ball going relative to me? Thank you for your help!
  9. D

    Does anyone know of Any Physics sandbox Games ti Download off the Internet?

    I am looking for games like OE cake, Burning sand and The Powder Toy...I have tried these out already so if anyone knows of any other ones, please reply to this... Thanks!
  10. K

    physics help: My friend rides on the back of a truck that's going away...

    ...from me at 25 km/hr. After the truck? passes, he throws a ball toward me at 55 km/hr relative to him. How fast is the ball going relative to me? I'm not sure how to figure this out. Thank you for your help!
  11. W

    Physics, what maximum distance can the truck travel? 10 pts!?

    A box rests on the (horizontal) back of a truck. The coefficient of static friction between the box and the surface on which it rests is 0.24. What maximum distance can the truck travel (starting from rest and moving horizontally with constant acceleration) in 3.0 s without having the box slide?
  12. L

    physics projectile question : horizontal distance travelled by a ball. ?

    A soccer ball is kicked from the ground. When it reaches a height of 5.85 m, the velocity is v=4.54i+7.13j m/s. The maximum height the ball reaches is 8.44 m. Determine the total horizontal distance travelled by the ball.What is the speed of the soccer ball just before it hits the ground?
  13. B

    physics: boat race which boat wins?

    Two boats start together and race across a 64 km wide lake and back. Boat A goes across at 64 km/h and returns at 64 km/h. Boat B goes across at 32 km/h, and its crew, realizing how far behind it is getting, returns at 96 km/h. Turnaround times are negligible, and the boat that completes the...
  14. P

    Satellite Physics problem?

    The speed of light is approximately 3.0 x 10^8 (that's 30 000 000) m/s. v = d/t so t = d/v time is distance traveled divided by speed However, remember that geosynchronous satellites orbit at the equator, and your reciever is at the pole, so you have to factor in the extra distance the signal...
  15. S

    How do I solve this Physics equation? What equation do I use? A streetcar

    named Desire travels between two sta? A streetcar named Desire travels between two stations 0.80 km apart. Leaving the first station, it accelerates for 11.5 s at 1.0 m/s2 and then travels at a constant speed until it is near the second station, when it brakes at 2.0 m/s2 in order to stop at the...
  16. G

    Help me quick with Physics! A geosynchronous satellite is one that appears

    to remain over one spot on Earth...? A geosynchronous satellite is one that appears to remain over one spot on Earth. Assume that a nearly geosynchronous satellite has an orbital radius of 4.43 107 m. (a) Calculate its speed in orbit. ? km/s (b) Calculate its period. ? h Thanks so much!
  17. I

    Calculus 2 / Physics Problem! Work required to launch satellite into orbit!?

    Find the work required to launch a 1000-kg satellite vertically into orbit 1000 km high. You may assume that the earth's mass is 5000 x 10^24 kg and is concentrated at its center. The radius of the earth is 6.37x10^6 m and the gravitational constant is 6.67 x 10^-11 N*m^2/kg^2. (hint: convert...
  18. J

    Physics, Orbiting Satellites question?

    A satellite of mass m is in a circular orbit of radius R2 around a spherical planet of radius R1 made of a material with density X. ( R2 is measured from the center of the planet, not its surface.) Use G for the universal gravitational constant. Question #1: Find the kinetic energy of this...
  19. K

    How do I do this physics satellite problem?

    A satellite has a mass of 5650 kg and is in a circular orbit 4.6 105 m above the surface of a planet. The period of the orbit is two hours. The radius of the planet is 4.05 106 m. What is the true weight of the satellite in orbit?
  20. S

    Physics Question: I need to find the kinetic energy of an orbiting satellite.?

    A 620 kg satellite orbits the earth where the acceleration due to gravity is 0.233 m/s^2. What is the kinetic energy of this orbiting satellite? I need to know how to do this...NOT the answer.
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