Chang sees the following formula on a website about newton’s second law. a = sigma f over m. what does the symbol f in the formula indicate that chang needs to do? he needs to find the net force acting on the object in a direction. he needs to use only forces acting in the direction of motion. he needs to combine the horizontal and vertical forces. he needs to multiply the horizontal and vertical forces.

What is the length x of the side of the triangle below? (hint: use the cosine function)

Ineed the answers for these promblems i have

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?