Answer:
I think it's D. open series circuit .
Explanation:
<em>hope</em><em> it</em><em> helps</em><em> you</em><em>!</em>
Answer:
C. The number of positive and negative charges can be the same.
Explanation:
Answer:
39.2m/s
Explanation:
The potential energy the book has right before it falls is equal to the kinetic energy in falling.
PE = KE
mgh = (1/2)mv
2gh=v
v=(2)(9.81)(2)
v=39.24m/s
Answer:
Part a)

Part b)

Explanation:
Part a)
If block is sliding up then net force must be zero and friction will be in opposite to the direction of motion of the block


so we have





Part b)
If block is sliding down then net force must be zero and friction will be in opposite to the direction of motion of the block


so we have




