Answer:
The velocity of the rock when it reaches the ground is
7
m
s
.
Explanation:
The formula we are using is
V
2
2
=
V
2
1
+
2
a
Δ
d
=> Where
V
is the velocity in
m
s
.
=> Where
a
is acceleration in
m
s
2
.
=> Where
Δ
d
is the change in displacement in
m
.
So now we just plug in the numbers.
V
2
2
=
V
2
1
+
2
a
Δ
d
=
0
+
2
(
9.8
)
(
2.5
)
=
√
49
=
7
The velocity of the rock when it reaches the ground is
7
m
s
.
According to the Newton's second law of motion:
Force = mass × acceleration
Acceleration = change in speed ÷ time
Therefore,
Force =mass × (change in speed/time)
Acceleration = 40 m/s ÷ 1.1 millisecond
Acceleration = 40 m/s ÷ 0.001 seconds
Acceleration = 40,000 m/s²
Hence,
F = m × a
F = 0.155 kg × 40,000 m/s²
F = 4,600 kg·m/s² (Newtons)
Answer:
__________
Explanation:
Answer:
The earth rotates because of the way it was formed. Our Solar System formed about 4.6 billion years ago when a huge cloud of gas and dust started to collapse under its own gravity. As the cloud collapsed, it started to spin.
B electromagnetic energy
C mechanical energy
D nuclear energy
Gasoline stores chemical energy, which can be transformed to other types of energy via chemical reactions, such as the combustion in a car engine.
The energy encapsulated within gasoline can be precisely characterized as chemical energy. This type of energy is encapsulated within the chemical bonds of various compounds, encompassing molecules and atoms. It is significant to note that chemical energy, as a versatile energy form, can be both liberated and harnessed as a source of power in diverse applications.
In the case of gasoline, it represents a potent reservoir of chemical energy. When gasoline undergoes combustion in the engine of a car, it engages in a chemical reaction. This reaction leads to the release of the energy contained within the chemical bonds of gasoline molecules. This released energy manifests in the form of mechanical power, propelling the vehicle, and heat energy, which warms the engine and the surrounding environment. In this process, gasoline's chemical energy is converted into mechanical and thermal energy, illustrating the dynamic interplay between different forms of energy in our daily lives.
The precise understanding of chemical energy's role in powering engines and facilitating various industrial processes underscores the fundamental principles of energy transformation and utilization, forming the basis of many technological advancements and applications.
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