here we can say that since the hill is friction less So total energy is now conserved
we can use the energy conservation principle now
here we can say that initial KE is zero as the child and sled is at rest
and the final potential energy will also be zero as the child will reach the bottom
So here we can say
so final speed will be 12.8 m/s
Weight is mass times gravitational acceleration. Without a specific location, Earths average gravitational acceleration is 9.807.
So .5x9.8.07= weight
The answer is 4.9035 newtons
The tension in the cables as the elevator travel upwards is 1,960 N.
The given parameters:
- Mass of the elevator, m = 200 kg
<h3>Newton's second law of motion;</h3>
Newton's second law of motion states that the force applied to an object is directly proportional to the product of mass and acceleration of the object.
The tension in the cables as the elevator travel upwards is calculated by applying Newton's second law of motion as shown below;
T = ma + mg
where;
- a is the acceleration of the elevator
- g is the acceleration due to gravity
At constant velocity, acceleration is zero (a = 0)
T = m(0) + mg
T = mg
T = 200 x 9.8
T= 1,960 N
Thus, the tension in the cables as the elevator travel upwards is 1,960 N.
Learn more about Newton's second law here: brainly.com/question/3999427
Answer:
Heat is the energy that flows between two substances of different temperatures.
Explanation:
Heat is a type of energy in transition that is transferred by non-mechanical means between systems, which means that it is energy that is transferred (or that <u>flows </u>) from one system to another.
This flow of energy occurs due to a temperature difference, and heat will flow from the system or substance with a higher temperature to the substance with a lower temperature, and if kept in contact they will eventually reach the thermal equilibrium.
So the correct answer is: Heat is the energy that flows between two substances of different temperatures.
Answer:
its the last question
Explanation:
Thats because erosion takes away stuff
