When the object slides across the rough surface some of its potential energy will be lost to friction.
<h3>Conservation of mechanical energy</h3>
The law of conservation of mechanical energy states that the total mechanical energy of an isolated system is always constant.
M.A = P.E + K.E
When the object slides across the rough surface, some of the potential energy of the object will be converted into kinetic energy while the remaining potential energy will be converted into thermal energy due to frictional force of the rough surface.
P.E = K.E + thermal energy
Learn more about conservation of energy here: brainly.com/question/166559
Work is performed while initially lifting books off the floor. The work is due to gravity.
Answer:
Explanation:
The path of waves reaching directly and through reflection from ionosphere will form a isosceles triangle.
Let the height be h . This will be height of a triangle of equal side whose base is of length 32 km. we shall calculate the length of one side of this triangle .
this length be l
l² = 16² + h²
l = √(256 +h² )
2l = 2√(256 +h² )
path difference = 2l - 32 km
For destructive interference
path difference = wavelength /2 for minimum height .
2l - 32 = .344/2
2√(256 +h² )- 32 = . 172
2√(256 +h² ) = 32.172
4(256 +h² ) = 1035
(256 +h² ) = 258.76
h² = 2.76
h = 1.66 km
Please be more specific! i need more clues if possible!
The magnitude of the force on the 4.00-kg block is 3.47 N.
The given parameters:
- Mass of first block, m1 = 2 kg
- Mass of second block, m2 = 4 kg
- Horizontal force, F = 5.2 N
<h3>Acceleration of both blocks;</h3>
- The acceleration of both blocks is calculated by applying Newton's second law of motion.
The magnitude of the force on the 4.00-kg block is calculated as follows;
F = ma
F = 4 x 0.867
F = 3.47 N
Learn more about Newton's second law of motion here: brainly.com/question/3999427