Recent content by wowdusk

Homework Statement A man walks for 4 hours at the rate of x miles per hour. He stops an hour for lunch and then returns on a bus to his starting point. However, the bus travels at a speed 6 times that of his walking rate and follows a route that is twice as long. "What is the total number of...

Homework Statement A man pushes a chair that weighs 60N with a force of 25N. The chair has a final speed of 4.0m/s. and a kinetic friction of .27. What is the acceleration? Homework Equations i have no idea where to start, i tired this formula that had me find distance but the...

Homework Statement When a person stands on tiptoe (a strenuous position), the position of the foot is as shown in Figure P8.16a. The total gravitational force on the body, Fg, is supported by the force n exerted by the floor on the toes of one foot. A mechanical model of the situation is shown...

Thank you! I was messing up the units XD

ARGGGGGGGG it still doesn't work what about -γMm/(R+r)= -gmR²/(R+r) how is this possible? idk I am so confused. I've been working on this single part for over 3 hours now and still i have no answer... i will never understand this :mad:

woud vi be the speed the Earth is rotating and vf be my answer from part b?

yes but would this be it .5*Ms*vi^2-GMeMs/Re=.5*Ms*vf^2-GMeMs/Rt like what would vi be and vf be? does anything get canceled out? I am not sure

would PEi= -GMem/ri? like i asked before how does -γMm/(R+r)= -gmR²/(R+r) confuzzled?!?

that doesn't help me much i knew that i need to use the conservation of energy...i just don't know how to apply it here...

Homework Statement a satellite of mass 200 kg is launched from a site on Earth's equator into an orbit 200 km above the surface of earth. a) assuming a circular orbit , what is the orbital period of this satellite? b)what is the satellite's speed in it's orbit? c) what is the minimum energy...

am i looking for angular velocity of velocity tangent to its orbit

ok you so i get GMm/r^2=mV^2/R, but still don't know what to do

Homework Statement the solar maximum mission satellite was placed in a circular orbit about 150 miles above earth. Determine (a) the orbital speed of the satellite and (b) the time required for 1 complete revolution Homework Equations The Attempt at a Solution

...still lost... idk what to do...

Homework Statement Neutron stars are extremely dense objects that are formed from the remnants of supernova explosions. many rotate very rapidly. suppose that the mass of a certain spherical neutron star is twice the mass of the sun and its radius is 10.0 km. determine the greatest possible...