You and your little cousin sit on a see-saw. You sit 0.5 m from the fulcrum, and your cousin sits 1.5 m from the fulcrum. You weigh 600 N. How much does she weigh?

200N

Explanation:

Distance from fulcrum by you  = 0.5m

Distance from fulcrum by cousin  = 1.5m

Your weight  = 600N

Unknown:

Weight of my cousin = ?

Solution:

From the principle of moment, when an object is balanced, the sum of the clockwise moment is equal to the sum of the anti-clockwise moment.

So;

   Your weight x distance from fulcrum by you  = Weight of cousin x her distance from the fulcrum

   600 x 0.5  = weight of cousin x 1.5m

    Weight of cousin  = 200N

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

gravitational energy

electrical energy

kinetic energy

ligh energy