Angular momentum: a light-weight potter's wheel, having a moment of inertia of 24 kg ∙ m2, is spinning freely at 40.0 rpm. the potter drops a small but dense lump of clay onto the wheel, where it sticks a distance 1.2 m from the rotational axis. if the subsequent angular speed of the wheel and clay is 32 rpm, what is the mass of the clay? a) 4.2 kg

4.2 kg

Explanation:

I' = moment of inertia of potter's wheel = 24 kgm²

w₀ = initial angular speed of the system = 40.0 rpm

w = final angular speed of the system = 32 rpm

m = mass of the  clay = ?

r = distance of clay from axis of rotation = 1.20 m

I₀ = Initial moment of inertia of the system = I' =  24 kgm²

I = final moment of inertia = I₀ + m r² = 24 + m (1.20)²

Using conservation of angular momentum

I₀ w₀ = I w

(24) (40) = (24 + m (1.20)²) (32)

m = 4.2 kg

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is