KIN 121 Lecture Notes - Lecture 2: Linear Motion

32 views1 pages

byzantiummammoth852

16 Dec 2015

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Print off copies of skeletal diagrams in text book (pg 28&29) **** Center mass (center of gravity): the point around which the body"s mass is equally distributed in all directions. If a body is in a constant state of motion (stillness or movement) This state is called velocity (stillness is 0 velocity) Any cause that produces a change in the state of rest, or state of motion. That is any cause that changes the acceleration of a body. *** in the textbook it uses the term general motion for combinations of above.

Related Questions

Match the following words with their descriptions:

1. Speed 2, Velocity 3, Acceleration 4. Force 5. Mass 6. Inertia

Rate at which an object covers a distance, disregarding direction.

Rate at which an object covers a distance in a given direction.

The tendency of objects to not change their state of motion unless acted on by an outside force.

Measure of the amount of matter in an object.

Rate at which an object changes its velocity.

A push or pull on an object, that when unopposed, results in a change in the object's state of motion.

ivoryllama613

1. The Yukawa Potential energy function for the interaction ofneutrons and protons in a nucleus is . (a) What is the forceassociated with this potential energy? (b) If and Find the value ofthe force at r=a and at r=3a

2. For what value of the constant c is the forceconservative?

3. In a two-stage rocket, the exhaust velocity for the first stageburn is 3000 m/s and for the second stage burn is 3000 m/s. Assumethat during the entire sequence of burns the rocket is still nearenough to the surface of the earth to approximate the externalgravitational acceleration as 9.8m/s^2 , and ignore air resistance.The mass of the first stage engine and tanks is 2000kg. The mass ofthe fuel held in the first stage is 4000kg. The first stage fuelburns in 10 seconds. The first stage is then ejected. The mass ofthe second stage engine, tanks, and payload is 2000kg. The mass ofthe fuel held in the second stage is 2000kg. The second stage fuelburns in 5 seconds. (The second stage tanks remain attached to thepayload when empty.) (a) At what speed is the second stage/payloadcombination moving at the end of the second stage burn? (b) Howmuch faster is this than the speed if all the 6000kg fuel wereburned in the first stage in 15 seconds with the same exhaustvelocity (3000m/s) and the entire 4000kg assembly of the emptyrocket remained in one piece?

4. A particle with mass 10kg starts from rest at r = 10 and ?=0radians, following the trajectory given by r=10-2t , ?=0.2t. Findthe radial and angular components and of the force, as functions oftime, that will cause this motion

5. A sheet of material, mass 2kg, uniform density, is in the shapeof a right triangle bounded by the lines y=0, x=0, and y=4-x. Itattched to the origin, and free to rotate about the y axis. A forceof 1000 Newtons is applied perpendicular to the plane, located atthe x=4 point on the triangle as it starts to rotate. In aright-handed coordinate system, how fast will the object bespinning (in radians per second) as it crosses the y-z plane (thatis, when it has rotated through 270 degrees)?

Thank you in advanced.

KIN 121 Lecture Notes - Lecture 2: Linear Motion

Document Summary

Get access

Related Documents

KIN 121 Lecture Notes - Lecture 1: Rotation Around A Fixed Axis, Linear Motion, Mechanical Advantage

PHY 101 Lecture Notes - Lecture 1: Contact Force, Electromagnetism, Classical Mechanics

PHYS 100 Chapter Notes - Chapter 4: Electric Field, Free Body Diagram, International System Of Units

Related Questions