Using a pulley system a girl is able to lift a 400 N weight using an input force of 80 N. If the weight moves the distance of 2 m, the girls will have to pull on the pulley rope for a distance of… A. 5m
B. 2m
C. 20m
D. 10m

Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)

Assume you measured the mass of the cart to be (500 ± 1) g and the mass of the additional mass you put on the cart to be (500 ± 1) g as well. since the scale you are using in the lab cannot measure objects heavier than 600g you will have to sum up individual pieces and propagate the error. so what would be the mass and the standard error of the cart and the mass

In which type of system is power held solely by the central government and not shared with regional governments? group of answer choices federal unitary confederate oligarchic