Answer:
The correct answer is
a) 1, 2, 3
Explanation:
In rolling down an inclined plane, the potential energy is Transferred to both linear and rotational kinetic energy thus
PE = KE or mgh = 1/2×m×v² + 1/2×I×ω²
The transformation equation fom potential to kinetic energy is =
m×g×h = 
= 
= 
=
Therefore the order is with increasing rotational kinetic energy hence
the first is the sphere 1 followed by the disc 2 then the hoop 3
the correct order is a, 1, 2, 3
Answer:
The mass of the ice block is equal to 70.15 kg
Explanation:
The data for this exercise are as follows:
F=90 N
insignificant friction force
x=13 m
t=4.5 s
m=?
applying the equation of rectilinear motion we have:
x = xo + vot + at^2/2
where xo = initial distance =0
vo=initial velocity = 0
a is the acceleration
therefore the equation is:
x = at^2/2
Clearing a:
a=2x/t^2=(2x13)/(4.5^2)=1.283 m/s^2
we use Newton's second law to calculate the mass of the ice block:
F=ma
m=F/a = 90/1.283=70.15 kg
D. 5.0A because this is right and will lead to the right answer okay you got this girl letssssss goooo googoggo Gogol
Answer:
a = 6 [m/s^2]
Explanation:
In order to calculate the acceleration of the skier, the following expression of kinematics must be used:
a = (v)/t
where:
v = velocity = 24 [m/s]
t = time = 4 [s]
a = 24/4 = 6 [m/s^2]
Answer:
Option (D)
Explanation:
Weathering refers to the disintegration of rocks due to the different geological processes that are initiated by agents such as wind, water and ice.
In a region where the temperature is high, and there is sufficient amount of moisture content in the air, there occurs high rate of physical, chemical and biological type of weathering.
- Physical weathering processes such as freeze-thaw method and exfoliation method commonly occurs in this type of region.
- Chemical weathering processes such as hydrolysis, oxidation, as well as carbonation method occurs in the region of high temperature, moist climatic condition.
- Biological weathering also is possible up to some extent as the plants takes up water from the rainfall and also receive enough sunlight for its growth, as a result of which it leads to the breakdown of rocks.
Thus, the correct answer is option (D).
