Calculating tension in cable

[AFG34]

1.the mass and acceleration is given and asks for tension in cable. What is a formula i could use.
2.in another question initial speed, air resistance, time and speed is given, what is a formula i could use for this question to solve for mass.

 

[radou]

1. Look up Newton's laws of motion.

2. It would be great to present the whole problem.

 

[AFG34]

1. An elevator of mass of 900 kg accelerates upwads at 3 m/s^2. What is the tension in the cable where it is attatched to the elevator?

2. A parachutist jumps out of an airplane at an initial speed of 2m/s down. There is a force of air resistance equivalent to 305 N. Determine the mass of the parachutist if it takes 3 seconds to travel 30 m down.

So his speed is 10 m/s. And i dnt know anything else

 

[radou]

As mentioned above, look up Newton's second law of motion. Part 1 is very simple. Part 2 includes a kinematical equation, i.e. the equation of displacement, from which you will obtain the acceleration.

 

[AFG34]

ok, thank you , appreciate it