According to the theory of global warming, the average temperature of Earth’s air began rising rapidly when humans first started
burning fuels such as oil. Burning these fuels releases carbon dioxide into the air. Scientists have observed that carbon dioxide traps heat from the Sun in Earth’s atmosphere. They have also observed ice melting in some areas.
Which part of the scientific cycle does the graph directly represent?
A.experiments
B.xplanations
C.questions
D.facts
Which part of the scientific cycle does the graph directly represent?
A.experiments
B.xplanations
C.questions
D.facts
2 answers:
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Answer:
Explanation:
Given that,
Initial angular velocity,
Acceleration of the wheel,
Rotation,
Let t is the time. Using second equation of kinematics can be calculated using time.
Let is the final angular velocity and a is the radial component of acceleration.
Radial component of acceleration,
So, the required acceleration on the edge of the wheel is .
The ball's vertical velocity at the time it just passes over the goal is 0 m/s. Its initial vertical velocity is unknown and we denote it by , where
here is the ball's initial speed. Vertically, the only force acting on the ball is gravity, which attributes a downward acceleration of 9.8 m/s^2. We expect the maximum height achieved by the ball to be 2.4 m, so we can find the initial speed by solving