Answer:
The sun's gravity pulls the planet toward the sun, which changes the straight line of direction into a curve. This keeps the planet moving in an orbit around the sun. Because of the sun's gravitational pull, all the planets in our solar system orbit around it.
Explanation:
you add the from head to tail. Head is the triangle and tail is the final point of the vector
Answer:

Explanation:
Net external force that exerted on the block is given as

here we know that



now we have

so we have

now the force exerted by bigger block on smaller block is given as



now we know that two blocks will exert equal and opposite force on each other
so here the force exerted by 2 kg block on 4 kg block will be
