At what height h above the ground does the projectile have a speed of 0.5v?
express your answer in terms of v and the magnitude of the acceleration of gravity g.

Explanation:

It is given that,

Speed of the projectile is 0.5 v. Let h is the height above the ground. Using the first equation of motion to find it.

Initial speed of the projectile is v and final speed is 0.5 v.

g is the acceleration due to gravity

Let h is the height above the ground. Using the second equation of motion as :

So, the height of the projectile above the ground is . Hence, this is the required solution.

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.