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Physics A level question

Can someone do this question for me. It’s forces and moments
image.jpg509.3KB
Im sorry, why doesnt the pic seem clear to me lol?
a) is the bar accelerating vertically?
b) just balance the moments about anywhere on the rod (though a good idea would be to do it about B)
Original post by Meowstic
a) is the bar accelerating vertically?
b) just balance the moments about anywhere on the rod (though a good idea would be to do it about B)

bar accelerating vertically? 🤣

What are you? A 5 year old??

Moments up = Moments down
Sum of forces up = Sum of forces down

Thats how OP does it
Original post by ClayJensen817
bar accelerating vertically? 🤣

What are you? A 5 year old??

Moments up = Moments down
Sum of forces up = Sum of forces down

Thats how OP does it

yes i am five years old that is why i am trying to talk to the op rather than outright telling them the answer so they don't understand it
Post some working first also gonna tag @Sinnoh
(edited 4 years ago)
Original post by Meowstic
yes i am five years old that is why i am trying to talk to the op rather than outright telling them the answer so they don't understand it


Oh umm... So youre 50 then...
Reply 7
Avatar for Sinnoh
Sinnoh
22
Remember that the rod is in equilibrium. This means that both the sum of the upwards forces = sum of the downwards forces, and that the sum of clockwise moments = sum of anticlockwise moments.
For the second part, you should start by working out all the clockwise and anticlockwise moments about the pivot. One of them will be unknown, but using the definition of equilibrium as written above it'll be enough to find it.

Original post by ClayJensen817
bar accelerating vertically? 🤣

What are you? A 5 year old??

Moments up = Moments down
Sum of forces up = Sum of forces down

Thats how OP does it


it was a rhetorical question
Original post by ClayJensen817
bar accelerating vertically? 🤣

What are you? A 5 year old??

Moments up = Moments down
Sum of forces up = Sum of forces down

Thats how OP does it


Have a think about the comment above. It sounds more confusing than the question itself.

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