Newton’s First Law of Motion states that a body that sits still or moves with a constant velocity with respect to a motionless observer will have its status unaltered until acted upon by an unbalanced force. Such a change in motion is accompanied by an acceleration, which is a change of velocity of an object:Continue reading “INTRODUCTION TO ELECTRONICS: Energy and Power ( Part 2 )”
Tag Archives: time
ENERGY AND MOMENTUM: The Joule
The International System of Units ( SI ) uses seven base units to describe seven fundamental quantities that can be measured by scientists: Symbol Name Base quantity second ( s ) time meter ( m ) length kilogram ( kg ) mass ampere ( A ) electric current kelvin (Continue reading “ENERGY AND MOMENTUM: The Joule”
AP PHYSICS: Graph-Slope Interpretation
Consider the time vs. position plots of an object in the graph below: Q: During which interval is the object moving forward with a constant velocity? Over which interval is the object accelerating, sitting still, and moving opposite to the initial direction of motion? A: We begin by designating the vertical direction as being theContinue reading “AP PHYSICS: Graph-Slope Interpretation”
AP PHYSICS: Graph-Slope Interpretation
Interpreting a graph of an object’s acceleration can be tricky, especially when the graph is linear: An object moving with a constant velocity moves through equal distance segments as time transpires. To the contrary, an object that is undergoing a constant acceleration has a velocity that changes as time transpires. As a consequence, plots ofContinue reading “AP PHYSICS: Graph-Slope Interpretation”
AP PHYSICS: Acceleration
An object that moves at a constant speed ( or velocity ) will continue doing so until it is acted upon by a force. Whether such an object speeds up or slows down after being impacted by a force, the change in motion is called an acceleration. Typically, a decrease in motion is referred toContinue reading “AP PHYSICS: Acceleration”
AP PHYSICS: Speed and Velocity
Q: Officer Chuck, a former track star at Clemson University, is in pursuit of a suspect that is 500 meters ahead of him. The suspect runs with a speed of 5 meters per second. Conversely, Chuck is running at a speed of 30 meters per second. Assuming that both participants in this sprint run inContinue reading “AP PHYSICS: Speed and Velocity”
AP PHYSICS: Average Speed
Q: A canoer crosses three-fifths the distance across a lake at speed ( v ). Unfortunately, the canoer begins to tire, and she finishes crossing the lake at one-half her initial speed. What was her average speed while crossing the lake? A: The average speed is determined by dividing the total distance traveled by theContinue reading “AP PHYSICS: Average Speed”
AP PHYSICS: Average Speed
Q: A distance runner has just finished her race. During the first 3 kilometers, she ran with a constant speed of 5 meters per second. During the latter 7 kilometers, she ran with a constant speed of 14.4 kilometers per hour. What is her average speed for the race? A: First, take note that theContinue reading “AP PHYSICS: Average Speed”
ENERGY AND MOMENTUM: What is the final velocity of the hovering disk?
Q: A disk of mass 0.5 kg slides with a constant velocity of 2.4 m/s over an air table before colliding with an elastic band. If the band exerts an average force of 1.4 Newtons on the disk for 1.5 seconds, what is the final velocity of the disc? A1: The disc will experience aContinue reading “ENERGY AND MOMENTUM: What is the final velocity of the hovering disk?”
KINEMATICS: Where Will The Daredevil Land?
Q: A stuntman equipped with a parachute rides a bicycle over the edge of a 500.0-meter building. The combined mass of the stuntman and his bicycle is 90.0 kg. If the bike moves at 24.2 m/s as it leaves the building’s edge, at what distance from the building’s base must a cushion be placed inContinue reading “KINEMATICS: Where Will The Daredevil Land?”
RENAISSANCE PHYSICS 