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D. Wool is an excellent thermal insulator because heat flows through it very slowly.</span>
A! Good luck on your test!
Answer:
20N toward the first team.
Explanation:
The net force is the resultant force that replaces the summation of the individual forces acting on a body.
Now in the game of a tug of war, let the summation of forces to the right be positive and the summation of forces to the left be negative
forces.
hence the summation of positive and negative forces must equal zero
that is,
100-80=0
20=0
Hence the resultant or the net force is 20N, and the direction tends towards the direction of the larger force which is to the right of the first team.
Answer:
18N
Explanation:
Mechanical Advantage of crowbar (lever), MA = Length of effort arm / Length of resistance arm
Therefore, MA = 28 cm / 4.2 cm = 6.667
Force required to pull the nail, F = Friction force / MA
ie, F = 120 N / 6.667 = 18 N