Help me please. i seriously hate physics

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to