Uniform Circular Motion: Sarah drives at a constant speed of 15 m/s around a circular horizontal curve of diameter 60 m. What are the magnitude and direction of her acceleration?
What will be an ideal response?
7.5 m/s2 toward the center of the circle
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The news writing style that places a summary first, followed by details, then background information is called the ______ style.
A. chunked text B. inverted pyramid C. dense paragraph D. conclusion-first
A 4.00-kg box sits atop a 10.0-kg box on a horizontal table
The coefficient of kinetic friction between the two boxes and between the lower box and the table is 0.600, while the coefficient of static friction between these same surfaces is 0.800. A horizontal pull to the right is exerted on the lower box, as shown in the figure, and the boxes move together. What is the friction force on the UPPER box? A) 19.3 N to the right B) 19.3 N to the left C) 23.5 N to the right D) 31.4 N to the right E) 31.4 N to the left
Astronomers observe huge bubbles of hot gas, some over a thousand light-years across, in the Milky Way. What is their cause?
What will be an ideal response?
Virgil rides a skateboard (combined mass 100 kg) at 4 m/s, and Jill rides a bicycle (combined mass 64 kg) at 5 m/s.
A. Jill has the greater kinetic energy. B. Virgil and Jill have equal kinetic energies. C. Virgil has the greater kinetic energy.