physics help pleaseeee?

[pimpdaddy5822]

1. Arlene is to walk across a high wire strung horizontally between two buildings 14.0 m apart. The sag in the rope when she is at the midpoint is 10.0°. If her mass is 52.0 kg, what is the tension in the rope at this point
____N

2. A person pushes a 11.0 kg lawn mower at constant speed with a force of 74.0 N directed along the handle, which is at an angle of = 43.0° to the horizontal.
(a) Calculate the horizontal retarding force on the mower
_____ N
(b) Calculate the normal force exerted vertically upward on the mower by the ground.
_____ N
(c) Calculate the force the person must exert on the lawn mower to accelerate it from rest to 1.0 m/s in 2.0 seconds (assuming the same retarding force).
_____ N