Physics, 24.12.2019 19:31 TH3L0N3W0LF
To a good approximate, the only external force that does work on a cyclist moving on level ground is the force of air resistance. suppose a cyclist is traveling at 15 km/h on level ground. assume he is using 480 w of metabolic power.
a. estimate the amount of power he uses for forward motion.
b. how much force must he exert to overcome the force of air resistance?
Answers: 2
Physics, 21.06.2019 15:30
If you quadruple the temperature of a black body, by what factor will the total energy radiated per second per square meter increase? 1,024 64 16 4 256 submit answer
Answers: 1
Physics, 21.06.2019 23:00
For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.
Answers: 1
Physics, 22.06.2019 17:30
Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.
Answers: 1
To a good approximate, the only external force that does work on a cyclist moving on level ground is...
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