5. Identify the object or objects in motion in each example of kinetic energy. • A speeding train:
A bowl of hot soup:
• Electrical energycarried by a wire:

Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

The x-coordinate of a particle in curvilinear motion is given by x = 3.1t3 - 4.9t where x is in feet and t is in seconds. the y-component of acceleration in feet per second squared is given by ay = 2.3t. if the particle has y-components y = 0 and vy = 5.0 ft/sec when t = 0, find the magnitudes of the velocity v and acceleration a when t = 1.8 sec. sketch the path for the first 1.8 seconds of motion, and show the velocity and acceleration vectors for t = 1.8 sec. answers: v = ft/sec a = ft/sec2

Wavelength, frequency, and energy are related. what happens to a wave as it’s wavelength gets shorter?