Given :
Mass of box , m = 250 kg.
Force applied , F = 285 N.
The value of the incline angle is 30°.
the coefficient of dynamic friction is 
.
To Find :
The speed with which the box is moving with, assuming it takes 4 seconds to reach the top of the incline.
Solution :
Net force applied in box is :
Acceleration , 
.
By equation of motion :
Therefore, the speed of box is 12.04 m/s.
Hence, this is the required solution.
Energy can only be converted from one form to another
eg kinetic energy is converted to heat energy
False because currents do not flow easily through insulators. If it only said conductors, then it would be true.
The woman weighs 100N now.
Explanation:
Given:
F is given as 400N
one full additional earth radius formed
To Find:
Weight of the woman=?
Solution:
We know that gravitational force is inversely proportional to the square of radius.
where
is the gravitational force
is the radius square
So when radius is doubled, the force becomes one fourth of the original.
Therefore 
Explanation:
The skeletal system helps maintain mineral homeostasis by regulating the level of calcium and other minerals in the blood by storing or releasing them from bones as needed. Bones also regulate blood glucose and fat deposition through the secretion of the endocrine hormone osteocalcin.
