Assignment:
Also, please answer the three questions below in one to 2 pages.
1. The density of lead is 11.3 g/mL. What is the density of a 2 foot long piece of 1 inch diameter lead pipe? What is the density of a one inch piece of this pipe?
2. A can of regular Coca-Cola sinks in a tub of water. A can of Diet-Coke floats in the water. What can you conclude from these observations about the relative densities of these cans? What could possible cause a difference in the densities of the two cans of soda?
3. Our bodies are a very irregular shape. Propose a method to determine the density of your body.
Please see the link for more info about we've done
https://docs.google.com/file/d/0B9D7fYKxWz6BTHBZRHZpQUVCSjg/edit?usp=sharing
The Experiment results
https://docs.google.com/file/d/0B9D7fYKxWz6BZjdoa0YzSU50MG8/edit?usp=sharing
Question:
1. Two dogs pulls horizontally on ropes attached to a post, the angle between the rope is 60° If dog A exert a force 270N and dog B exert a force 300N find the magnitude of the Resultant force and the angle it makes with dog A's rope.
2. A crate with mass 32.4kg initially at rest on a warehouse floor is acted on by a horizontal Force of 140N
(a) What is the acceleration produces?
(b) How far does the crate travel in 10s?
(C) What is its speed at the end of 10s?
3. At the surface of Jupitor's moon the acceleration due to gravity is g=1.8m/s2.a watermelon Weigh 44N at the earth's surface
(a) what is the watermelon's mass on the Earth's surface
(b) What are its mass and weight on the surface of Jupitor's moon.
4. A student with mass 45kg jumps off a high diving board. using 6x1024kg for the mass of the earth what is the acceleration of the earth towards her as she accelerate towards the earth with an acceleration of 9.8m/s2. Assume that the net force on the earth is theForce of gravity she exert on it.