Recent content by NatalieWise123

OK so I can do 2.3*9.8*15= 338.1 J which is final PE but since they're equal that is the answer for initial KE?

Can you explain further? I don't really understand.

Homework Statement A ball with a mass of 2.3 kg is thrown into the air. If the ball rises to a maximum height of 15 m before stopping and coming back down, how much kinetic energy did the ball have initially? Homework Equations KE=0.5*mass*velocity^2 The Attempt at a Solution I don't think...

would the output just be equal to the input then?

Homework Statement You apply 14,500 J of work to one end of a crowbar. If the crowbar is 1.2 m long, how much work is produced by the crowbar? (friction is not a factor) Homework Equations Work=distance*force The Attempt at a Solution There's hardly any information in this question so the...

Homework Statement Two hockey pucks are sliding across the ice in the same direction. One has a momentum of 35 kg*m/s. The other has a momentum of 7 kg*m/s. After the collision, the pucks stick together. What is the momentum of the pucks after the collision? Homework EquationsThe Attempt at a...

Sort of. Would output force be F2?

In a really general sense. I understand it though.

We haven't learned that yet

I'm thinking it has something to do with Idea Mechanical Advantage which is output/input I believe.

Angular Momentum= mass*velocity*radius

Homework Statement You apply a force of 17 N to a wheel with a radius of 0.75 m. If the axle has a radius of 6 cm, what is the output force, assuming the machine operates under ideal conditions? Homework EquationsThe Attempt at a Solution I don't even know how to begin to begin this. Help!

That would be a total thrust of 30,250,000 N. Then you'd do 30,250,000N-19,600,000= 10,650,000 to get resultant force. The resultant force/mass would be: 10,650,000/2.0 x10^6 kg= 5.3 m/s^2. Right?? And that's not an answer choice.

Homework Statement The mass of a space shuttle is approximately 2.0 x10^6 kg. If the thrust provides a force of 1.2 x 10^7 N, what is the acceleration of the space shuttle at lift off? 6.0 m/s2 0.06 m/s2 1.67 m/s2 0.167 m/s2 Homework Equations Resultant force = thrust – weight Acceleration =...