Question

Calculate net forces.draw an arrow to show direction.

Answer 1

Answer:

1. 100 N

2. -10 N

3. 0 N

4. 0 N

Explanation:

Vectors in the same direction are added and the resulting vector is in the same direction as that of the given vectors that are added.

Vectors in the opposite direction are subtracted and the direction of the resulting vector is in the direction of that vector that has larger magnitude.

Question 1:

30 N and 70 N are in same direction. So, the resultant force is addition of the two and is given as:

Net force = 30 N + 70 N = 100 N

The direction is same as that of 30 N and 70 N forces.

Question 2:

30 N and 40 N are in opposite direction. So, the resultant force is subtraction of the two and is given as:

Net force = 30 N - 40 N = -10 N

The direction is same as 40 N force as this has larger magnitude.

Question 3:

60 N and 60 N are in opposite direction. So, the resultant force is subtraction of the two and is given as:

Net force = 60 N - 60 N = 0 N

The direction is represented by a dot.

Question 4:

18 N and 12 N are in same direction. So, the resultant force is addition of the two and is given as:

Net force = 18 N + 12 N = 30 N

Now, 30 N and the third force 30 N are in opposite direction. So, the resultant force is subtraction of the two and is given as:

Net force = 30 N - 30 N = 0 N

The direction is represented by a dot.