un corpo di massa 40kg si muove con accelerazione a=0,35m/s^2 perché sottoposto ha una forza esterna. Descrivi quanto misura la forza e quanto è la velocità dopo 15 secondi

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

Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.

Question 1 (5 pts): what is the maximum distance for which you can you resolve the two individual headlights of an on-coming truck as two separate lights rather than one if the headlights are separated by 2.00 m and your eye has a diameter of 1.00 centimeter? assume a wavelength of 500 nm.