A spaceship captain lands on an unknown planet. Before venturing forth, he needs to find out the acceleration due to gravity on that planet

All he has available to him is some thin light string, a stopwatch, and a small 2.75-kg metal ball (it was a rough landing). So he lets the ball swing from a 1.5-m length of the string, starting at rest, and measures that it takes 1.9 s for it to swing from the place where he released it to the place where it first stops as it reverses direction. What is the acceleration due to gravity on this planet?


4.1 m/s2

Physics & Space Science

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What do the orbits of Populations I and II stars tell us about the formation of the Milky Way?

What will be an ideal response?

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You can hear sound through an open window from sources that are not in your line of sight because of __________

Fill in the blank(s) with correct word

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If Q = 16 nC, a = 3.0 m, and b = 4.0 m, what is the magnitude of the electric field at point P?



a.
33 N/C

b.
31 N/C

c.
24 N/C

d.
19 N/C

e.
13 N/C

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