2. Apply Newton's second law to calculate the frictional force needed to hold a 15 g pen in your fingers and keep it from falling. (g = 9.8 m/s2)

0.147N

Explanation:

F = m( v-u )

t

This rewritten as

F = ma

For the pen to be held without falling , the frictional force must be equal to the force that would bring the pen down.

right

explanation:

plasma is the state of matter where the substance is ionized and has no definite shape or volume. the fact of being ionized makes the substance a good electrical conductor.