During the summer, the Northern Hemisphere of the Earth is angled toward the sun as the Earth revolves around the sun. During the winter, the Northern Hemisphere of the Earth is oriented away from the sun creating a shorter day and a longer night.
<h3>Answer</h3>
option B)
19N
<h3>Explanation</h3>
If the object is at equilibrium, then the net force acting upon the object should be 0 N. Thus, if all the forces are added together, horizontal and vertical forces separately, then the resultant force (the vector sum) should be 0 Newton.
As we only need to find the magnitude of x-component of force F (which i assume is the 4th force which makes it equilibrium)
so find all x component/horizontal forces acting on the object.
50cos(40) - 40cos(25) + 30cos(55) + x = 0
38.30 - 36.25 + 17.21 + x + = 0
19.26 + x = 0
x = - 19.26
x ≈ 19 (magnitude only)
Thermal energy also known as 'heat energy' is a form of kinetic energy.
Answer:
System with earth at centre and body revolving around it.
Explanation:
Given that gravitational and kinetic energy should be nearly equal without changing the mass or height.
So ,
Let us consider a system where we have a body revolving around the earth with a velocity such that it remains in orbit.
Gravitational potential energy at a height h from the ground is given by
For velocities satisfying abow the system can have gpe and ke same in ideal cases.
[Note: For the abow velocity usually the body will escape as potential at infinity will be zero .This can just be a type of system where gpe and ke will be equal without mass and height changing.]
Answer:
Golf ball A was hit with a weaker force
Explanation:
Golf ball B went a larger distance than golf ball A, so we could think friction affected golf ball A rather than golf ball B. That is why the first two choices are wrong.
The strongest forced applied made golf ball B go further.