Ok so Net force is the vector sum of forces acting on a particle or body. The net force is a single force that replaces the effect of the original forces on the particle's motion. It gives the particle the same acceleration as all those actual forces together as described by the Newton's second law of motion.
If 2 children are both pulling on the toy and giving the same amount of Newton’s then nothing would change. If one child is giving more Newton’s then that Child would end up with the toy.
I hope this helped. I didn’t really know how to explain it. <3
The change in momentum of the car is 45,000 kg m/s
Explanation:
The change in momentum of an object is given by:
where
m is the mass of the object
u is its initial velocity
v is its final velocity
For the car in this problem, we have
m = 900 kg
u = 30 m/s
v = 80 m/s
Therefore, the change in momentum is:
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The time taken by the light reflected from sun to reach on earth will be 8.4 minutes.
To find the answer, we need to know about the distance travelled by light.
<h3>How to find the time taken by the light reflected from sun to reach on earth?</h3>
- So, in order to solve this problem, we must first know how far the moon is from Earth and how far the Sun is from the moon.
- These distances are given as 3.8×10^5 km (Earth-Moon) and 1.5×10^8 km (Sun- Earth).
- Since the Moon and Sun are on opposite sides of Earth during a full moon, the light's distance traveled equals,
- As we know that light travels at a speed of 300,000 km per second. then, the time taken by the light reflected from sun to reach on earth will be,
Thus, the time it takes for the light from the Sun to reach Earth and be recognized as 8.4 minutes.
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Answer:
Option (3)
Explanation:
Aurora refers to those northern and southern light observed in both the poles of earth. At the poles, when sunlight comprised of numerous charged particles are emitted from the sun are incident on the atmosphere of the earth, it reacts with the earth's magnetic field and results in the rapid movement of electrons within the atoms, from a region of lower energy state to a higher state. After sometimes when these electrons are back into the lower-energy state then photons are released in the form of beautiful lights which are known as aurora.
These lights are known as aurora borealis when observed in the north pole, and aurora australis when observed in the south pole.
Thus, the correct answer is option (3).