which of the following would increase the output force of a lever?
a. increase the distance between the effort and the fulcrum
b. decrease the distance between the effort and the fulcrum
c. decrease the distance between the resistance and the effort
d. increase the distance between the resistance and the fulcrum

Why is alternating current more effective at long–distance travel than direct current? a. the power lines are made out of conductors. b. transformers increase or decrease voltage as needed. c. the ac generator is more efficient. d. ac has lower voltage than dc.

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.