A pendulum by itself can provide valuable insight into harmonic motion and the relationship between frequency and period. ... velocity and acceleration, useful in illustrating both of these concepts.

And our final velocity was 0.72 metres per second. And the time in between was 0.857 seconds. Now acceleration equals final velocity, minus initial velocity, divided by time.

In the late 1970s, astronomers Vera Rubin and Albert Bosma independently found that spiral galaxies rotate at a nearly constant speed: the velocity of stars and gas inside a galaxy does not ...

In this case, the acceleration is zero m/s 2 (as seen in the graph showing the acceleration) and the tension in the string is just the weight of mass 2 (0.145 kg)*(9.8 N/kg) = 1.421 N. The masses ...

Wide binary stars with separation greater than about 2000 astronomical units are interesting natural laboratories that allow a direct probe of gravity at low acceleration weaker than about 1 ...

Sep 21, 2016: In rotating galaxies, distribution of normal matter precisely determines gravitational acceleration (Nanowerk News) In the late 1970s, astronomers Vera Rubin and Albert Bosma ...