Forces in 2D Trouble!!! Two forces act on a 27 kg mass to give itan acceleration of 29 m/s2 in the positive x direction. If one of the forces acts in the negative y direction with a magnitude of 570 N, what is the magnitude of the second force.

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

For those who need theses answers i just took the test and got everyone of them

What is the volume of 2400kg of gasoline (petrol) if the density of petrol is 0.7g/km3