What does a machine change to make work easier? Select three options. the amount of work done
the amount of force applied
the time needed to do the work
o the direction of a force
the distance over which a force is applied

the electric field is a “force field” around a charged object that illustrates the direction the electric force would push an imaginary 

massxgravity x heght=weightxheight= pe

4900=490xh

h=10

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles