During the fall, all the initial potential energy of the rock
has converted into kinetic energy of motion
where h is the initial height of the rock, m its mass, and v its velocity just before hitting the water. So, for energy conservation, we have
and so we can find the value of K, the kinetic energy of the rock just before hitting the ground:
Answer:
the minimum value of torque is 101.7 N-m.
Explanation:
Given that,
Mass of bundle of shingles, m = 30 kg
Upward acceleration of the shingles,
The radius of the motor of the pulley, r = 0.3 m
Let T is the tension acting on the shingles when it is lifted up. It can be calculated as :
T-mg=ma
T=m(g+a)
Let 
is the minimum torque that the motor must be able to provide. It is given by :
the minimum value of torque is 
Here is your ans
Explanation:
The formula of compound such as CH4
Indicates the types of atoms present with subscripts representing the relative numbers of answers
Tq
Reactivity is the ability of matter that allows it to easily chemically combine with other substances.
Answer:
PV = k
Explanation:
Boyles law states that the pressure P of a fixed mass of gas is inversely proportional to its volume V provided that the temperature T is constant (i.e does not vary).
Mathematically, boyle's law can be expressed as;
P = k/V where k us the constant of proportionality. From the equation;
PV = k which is also equivalent to;
P1V1 = P2V2 = PnVn
P1, P2... Pn are the values of the pressures
V1, V2...Vn are the values of the volumes
