Asmall block of mass 200 g starts at rest at a, slides to b where its speed is vb=8.0m/s, vb=8.0m/s, then slides along the horizontal surface a distance 10 m before coming to rest at c. (see below.) (a) what is the work of friction along the curved surface? (b) what is the coefficient of kinetic friction along the horizontal surface?

Answer

given,

mass of the block = 200 g = 0.2 Kg

Velocity at A = 0 m/s

Velocity at B = 8 m/s

slide to the horizontal distance = 10 m

height of the block be = 4 m

potential energy of the block

    P = m g h

    P = 0.2 x 9.8 x 4

    P =7.84 J

kinetic energy

Work = P - KE

work = 7.84 - 6.14

work = 1.7 J

b) v² = u² + 2 a s

   0 = 8² - 2 x a x 10

   a = 3.2 m/s²

ma - μ mg = 0

answer is c

explanation:

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d