Question

Calculate the net force:
8n 10n

18N
or
2N



18N



2N

Answer 1

Answer:

A+B=16...(1)

tanα=

A+Bcosθ

Bsinθ

=tan90

Thus, A+Bcosθ=0⇒cosθ=−

B

A

...(2)

We also have: 8=

A

2

+B

2

+2ABcosθ

...(3)

Solving these we get, A=6N and B=10N

Answer 2

we can calculate the net force of 8n and 10n=18n