STRENGTH OF MATERIALS

density of metal can’t be determined

metal is twice as dense as water

metal will float in water

metal is twice as dense as unknown fluid

two lubricated surfaces

two dry surfaces

bodies having relative motion

solids and liquids

parabola

hyperbola

ellipse

circle

Three forces acting at a point will be in equilibrium

If three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two

Three forces acting at a point can be represented by a triangle, each side being proportional to force

If three forces acting upon a particle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium

the tangent of the angle of repose is equal to coefficient of friction

the tangent of the angle of friction is equal to coefficient of friction

the sine of the angle of repose is equal to coefficient to friction

the angle of repose is equal to angle of friction