Apply Newton's second law to the bucket's vertical motion:
F = ma
F = net force, m = mass of the bucket, a = acceleration of the bucket
Let us choose upward force to be positive and downward force to be negative. The net force F is the difference of the tension in the rope lifting the bucket and the weight of the bucket, i.e.:
F = T - W
F = net force, T = tension, W = weight
The weight of the bucket is given by:
W = mg
W = weight, m = mass, g = gravitational acceleration
Make some substitutions:
F = T - mg
T - mg = ma
Isolate T:
T = ma + mg
T = m(a+g)
Given values:
m = 5kg, a = 3m/s², g = 9.81m/s²
Plug in and solve for T:
T = 5(3+9.81)
T = 64.05N
Acceleration = force/mass
1/4
s=ut+1/2at^2
0*4+1/2*1/4*4^2
1/2*1/4*16
1/2*4
=2
The complete options are;
A. The average kinetic energy of their particles is the same.
B. The total kinetic energy of their particles is equal.
C. Heat flows from the larger object to the smaller object.
D. Heat flows from the object with higher potential energy to the object with lower potential energy.
Answer:
Explanation:
From the relationship between average kinetic energy and temperature, we have the formula;
E_k = (3/2)kT
Where;
k is a constant known as boltzmann constant.
T is known as temperature
We can see that at the same temperature (T), kinetic energy will remain the same because from the formula, E_k depends km only the temperature.
Thus, average kinetic energy of their particles saying that.
1h----------------> 70x3=210 bacteria
2h-----------------> 210*3=630 bactaeria
let be y the number of bacteria at the t=0h
it is y=70 3^0
for t= 1h
y=70*3^1=210
for t=2h
y=70*3^2=630
so we can write y=70*3^x, where x is the number of hour
