Oh, one more thing. The next question is asking:
A dog rocketed over to the moon and landed there. What escape velocity (from the surface of the moon) did the dog need for his return trip to Earth?
Do you just use the equation for escape velocity or is there some trick to this question...
It's for a lab so I can't write it exactly as it is or it will make no sense. I'll try my best:
A doghouse has a mass of 150 kg. The mass of the Earth is 5.98 x 10^24 kg. The radius of the Earth is 6.28 x 10^8 m. What is the kinetic energy of the doghouse in orbit at 500 km above the earth...
Okay, but here's my problem. I'm given the radius of the Earth (one of the masses), but not the radius of the doghouse (the other mass). I AM given the distance between the two objects. So is radius of the doghouse so small that it is insignificant?
If so, do I just add the radius of the...
When doing problems involving centripetal force, using the equation:
F = mv^2/r ,
is r the distance between the centers of the two masses or is it the distance between the surfaces?
This question was written assuming we know nothing about the law of conservation of energy. There must be a way to solve it by using only equations related to forces and motion.
Homework Statement
A skier skiing downhill reachers the bottom of a hollow with a velocity of 20 m/s, and then coasts up a hill with a 10 degree slope (@). If the coefficient of kinetic friction is 0.10, how far up the slope will she travel before she stops?
Homework Equations...
If an object is tied to a string in vertical circular motion (yes, I mean vertical as in the string has the force of gravity acting on it), does it actually change speed? I was given a question where the 'average speed' of an object in vertical circular motion was 6.1 m/s, and then they wanted...
I think you' ve explained it the best you can, and although I can say that I'm starting to understand the mechanism... it would be a LOT better if I see it in action.
Thanks for your help. I'll buy one and see how it works.
Okay, I KNOW what a mousetrap is used for. I also know that the hammer slams down on the side of the bait and - most of the time - kills the mouse. What I'm still confused about, though, is the actual mechanism. How does stepping on the area of the bait cause the spring to release? And why, when...
I already read that and here's what I'm confused about:
"It is a simple device with a heavily springloaded bar and a trip to release it."
What is a heavily springloaded bar and a trip?
I know this may sound like a stupid question but I am the WORST when it comes to any of these mechanisms.
How does a mousetrap work? I tried searching this on the Internet but they just say that it is 'spring-loaded'. What does that mean? And most sites simply say that a mousetrap is a device...