Homework Statement
1)Find the gravitational force between then sun (2*10^30 kg) and the Earth (5.97*10^24 kg). Earths distance from the sun is 1.5 * 10^11m.
2) find the distance between a 5 kg object and a 10kg object if their gravitational force is 1*10^-4N.
Homework Equations
Fg=...
Well for the second equation I just used the 2πR/T, so 2(3.14)(.3)/60seconds=.0314m/s. Then I plugged that into A=v^2/r, A=.0314^2/.3 and got .00328 m/s^2. Then, I plugged that it F=ma.. So F=(.5)(.00328)= .00164 N.
For my first equation, I plugged in A=(30)^2/.5 and got 1800 m/s^2. Then I used F=ma... F=(.3)(1800) and got 540N. I wasn't there when this was taught so I'm not sure if I'm heading in the right direction. :/
Homework Statement
A yoyo is spun with a radius of 0.5m. It reaches a velocity of 30m/s. What is the force if the yoyo is 0.3kg?
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A clock has a hand with 0.3m long and 0.5kg. It takes 60 seconds for 1 revolution. What is its acceleration? What is the force?
If you have any tips or...
... I was not given a specific equation, but the equations surrounding the lesson are f=ma, Ffriction=(μK)(Fnormal). Don't know if that's of any relevancy.
I don't think distance is relevant in this particular question. I know that the weight of the stone is going to be 20 N (conceptual physics) and as for the TV, 120 N. But I don't know how MANY rocks I'm going to need to lift the TV up, nor the net force.
How many stones (mass=2kg) are needed to lift a TV (mass=12kg) on a seesaw? What is the weight of the stones? TV? Net force?
I DEEPLY apologize if I posted this question in the wrong section AND if this question seems idiotic and simple. I am a student in high school and I am not experienced...