To give a 19kg child a ride, two teenagers pull on a 3.7 kg sled with ropes, as indicated in the figure. Both teenagers pull with a force of 55N at an angle of 35 degrees relative to the forward direction, which is the direction of motion. In addition, the snow exerts a re t a r d i n g force on the sled that points opposite to the direction of motion, and has a magnitude of 57N, find the acceleration of the sled with the child.

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.

The answer would be a) -80of