MasteringPhysics: Assignment Print View
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10/4/2007 3:41 PM
PHCC 141: Physics for Scientists and Engineers I - Fall 2007
3a. Motion in Two or Three Dimensions
Due at 11:59pm on Friday, September 7, 2007
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Standard kinematic definitions, two body problems
Position, Velocity, and Acceleration
To identify situations when position, velocity, and /or acceleration change, realizing that change can be in
direction or magnitude.
If an object's position is described by a function of time,
(measured from a nonaccelerating reference frame), then the object's
velocity is described by the time derivative of the position,
, and the object's acceleration is described by the time
derivative of the velocity,
It is often convenient to discuss the average of the latter two quantities between times
You throw a ball. Air resistance on the ball is negligible. Which of the following functions change with time as the ball flies
through the air?
Newton's 2nd Law
Hint not displayed
only the position of the ball
only the velocity of the ball
only the acceleration of the ball
the position and velocity of the ball
the position and the velocity and acceleration of the ball
You are driving a car at 65 mph. You are traveling north along a straight highway. What could you do to give the car a nonzero
What constitutes a nonzero acceleration?
Hint not displayed
Press the brake pedal.