13. Which of the following groups of simple machines represent variations of an inclined plane? a. pulley, lever and wedge
b. pulley, wheel and axle
C. Screw and wedge
d. wheel and axle, screw

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.

c. magnitude and direction

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

+15-35=-20

going in opposite directions