The total force applied by the three people is:

This force is pushing toward the direction of the motion, while the frictional force

points in the opposite direction.
We can write Newton's second law applied to the block: the resultant of the two forces must be equal to the product between the block's mass and its acceleration

We know the mass of the block, m=500 kg, and the acceleration,

, so we can find the friction:
Answer:
it is attracted to negative pole
H. O is the answer hope this helps
2
Answer:
2,100J
Explanation:
Workdone=Force x distance
=700 x 3
=2,100 J