What happens to the sum of the ball’s kinetic energy and potential energy as the ball rolls from point a to point e? assume there’s no friction between the ball and the ground.
a. the sum decreases.
b. the sum increases.
c. the sum remains the same.
d. the sum always equals zero.
Answers: 2
Physics, 21.06.2019 21:00
While listening to operatic solos, musicians process the lyrics and the tunes in separate brain areas. this most clearly illustrates the functioning of different
Answers: 1
Physics, 22.06.2019 02:00
Askydiver weighing 140 lb (including equipment) falls vertically downward from an altitude of 19,000 ft and opens the parachute after 18 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.55|v| when the parachute is closed and is of magnitude 14|v| when the parachute is open, where the velocity v is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. (a) find the speed of the skydiver when the parachute opens. (b) find the distance fallen before the parachute opens. (c) what is the limiting velocity vl after the parachute opens? (d) determine how long the sky diver is in the air after the parachute opens. (e) plot the graph of velocity versus time from the beginning of the fall until the skydiver reaches the ground.
Answers: 1
What happens to the sum of the ball’s kinetic energy and potential energy as the ball rolls from poi...
Chemistry, 26.03.2021 05:50
Biology, 26.03.2021 05:50
Spanish, 26.03.2021 05:50
Mathematics, 26.03.2021 05:50
Physics, 26.03.2021 05:50
Mathematics, 26.03.2021 05:50
Computers and Technology, 26.03.2021 05:50
Mathematics, 26.03.2021 05:50
Mathematics, 26.03.2021 05:50
Mathematics, 26.03.2021 05:50