Recent content by contlee

Homework Statement Star A is in a circular orbit of radius R around point P. The period of the star is T. Determine the mass of the Star Homework Equations I do not know how to find the mass of the orbiting body. I found the centripetal acceleration which equaled GM/R^2. I could find...

I'm still confused so the acceleration is o when the compression is kinetic energy is zero

A 2kg block is placed pushing against a spring. The spring is compressed and stores 10 joules of potential energy. The block remains attached to the spring as it oscillates on a frictionless track. The mass experiences zero acceleration when the spring compression is __________ A. greatest...

but would the tan method work

The coefficient of friction between a surface and a block in .41. Determine the angle needed for a 2kg block to slide down the plane with a constant speed. Well after drawing a free body diagram I really couldn't see any way to go about solving. So i decided to name what i knew. I know the...

thanks for the help. really appreciate it

i am still confused, So i worked it out the way you told me, but since i am looking for the amount of force the floor is exerting on the person should i find the normal force. or should it just be Mass x Gravity Here is my work (Mass)(Acceleration)=Normal Force-(Mass)(Gravity) -210=Normal...

A 70kg person is in an elevator the elevator has an acceleration of 3m/s/s DOWNWARD. What force will the floor exert on the person. I am confused on the the equation. So far I think (mass)(acceleration)=(mass)(gravity)-(normal force). I know the mass is 70kg or 700N. I also know the...

Suppose a 70kg person is in an elevator. The acceleration of the elevator is -3m/s/s. What force would the floor exert on the person? Please show work...