Question

2.
7n ← —→ 2n
net force:

4.
6n —→ + —→ 3n
net force:

6.
4n —→ ← 5n
net force:

8.
2n →
4n —→ ← 5n
net force:

10.
7n ←
4n —→ —→ 4n
net force:

Explanation:

Problem 2:

Step1: Identify force directions

Forces are opposite (left: 7N, right: 2N). Subtract smaller from larger.
$F_{net} = 7N - 2N$

Step2: Calculate net force

$F_{net} = 5N$ (direction: left, since 7N > 2N)

Step1: Identify force directions

Forces are in the same direction (both right: 6N and 3N). Add them.
$F_{net} = 6N + 3N$

Step2: Calculate net force

$F_{net} = 9N$ (direction: right)

Step1: Identify force directions

Forces are opposite (right: 4N, left: 5N). Subtract smaller from larger.
$F_{net} = 5N - 4N$

Step2: Calculate net force

$F_{net} = 1N$ (direction: left, since 5N > 4N)

Answer:

5N (left)

Problem 4: