Answer:

Explanation:
since force is applied downwards at some angle with the horizontal
so here we will have

now we know that the box will not move if applied force is balanced by frictional force on it
so we will have




so here we can say





Answer:
The element "AI" has:
Protons: 13 Neutrons: 14 Electrons: 13
Have a great day.
Answer:
Making the lumber thick will make it stiff, which seems good. On the other hand, with thicker lumber, differences in expansion on the two faces have more leverage to make the lumber move.
20m away
the dog was 60m away from. you subtract 40m since it is 10m/s x 4 seconds