How does a single fixed pulley, like the one seen here, you do work?
a) changes the direction of the force
b) increases the amount of applied force
c) decreases the amount of applied force
d) allows you to pull the rope a shorter distance

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Which changes of state do the labels represent? a: b: c:

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f