Afootball player running at two meters per second dives towards a football flying towards him with a velocity of five meters per second. what is the relative velocity of the football player and the football?
a. 0 m/s
b. 2 m/s
c. 5 m/s
d. 7 m/s

option d.

Explanation:

In this situation, we can suppose that the football player has a velocity of 2m/s in the positive x-axis, and the ball has a velocity of -5m/s in the x-axis.

If we step in the point of view of the football player, all the previous x-axis now moves with the same velocity that the player had, but in the other direction, so all the axis now moves with a velocity of -2m/s. And the ball that also is in the axis also gets this "boost" in velocity.

So now the velocity of the ball is -5m/s -2m/s = -7m/s where the minus sign is because of the situation that I crafted.

So the correct option is the option D

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.

. west