A particle of mass 5kg is pulled along a rough horizontal surface by a string which is inclined at 60° to the horizontal. if the acceleration of the particle is 1/3×g ms^-2 and the coefficient of friction between the particle and the plane is 2/3, find the tension in the string.

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Explain to someone who knows nothing about fossils the study of invertebrate paleontology and how it scientists understand the history of the earth. be sure your explanation contains a minimum of two complete sentences.