Answer:
true I, II and III
Explanation:
The force is a vector quantity, by local it must be added as vectors, we can suppose several cases
.i) the vectors are colonial, so their sum is maximum
F_max = 9 + 15 + 18
F_max = 42 N
This is the maximum value
ii) the anti-parallel vectors giving a minimum value
F_min = 15 + 9-18
F_min = 6 N
iii) the vectors have angles between them, so we must use the Pythagorean theorem to find the resultant, which is an intermediate value between the two extreme values found.
Let's take a look at each statement
I) True This is the maximum value of the force if all the vectors are colonial
II) True The minimum value is 6 N, so zero can never be reached
III) True these bores are between the maximum values and the direction of the vectors, lower values occur when the forces have angular between them
IV) False. Force can never reach zero
V) False. Several of the above are conclusions of the exercise
Aristotle created and it’s credited as the creator.
So momentum is calculated by multiplying mass and velocity together so this problem can be seen as 8kg * velocity=16p (p=momentum) so doing this we can calculate that the velocity must be 2m/s
Answer:
L = 239.2 J.s
Explanation:
The angular momentum of the rod is given by the following formula:
L = mvr
where,
L = Angular Momentum = ?
m = mass = 13.1 kg
r = radius of circle of rotation = length of rod = 2.15 m
v = linear speed of rod = r(angular speed of rod) = (2.15 m)(3.95 rad/s)
v = 8.5 m/s
Therefore,
L = (13.1 kg)(8.5 m/s)(2.15 m)
<u>L = 239.2 J.s</u>
Answer:
Part 1)
E = 10200 Cal per day
Explanation:
Part 1)
Small mouse used the energy of 3 Cal
mass of the mouse = 20 g
so energy used per day per unit of mass is given as
Now for a person of mass 68 kg the energy is
per day
Part 2)
Resting power means the rate of energy consumed by the body while we are not doing any work and all that energy is consumed for several biological process.