Answer:
5.74s
Explanation:
We can first solve for the initial angular velocity using the following formula
Where is the final angular velocity, is the angular acceleration and is the angular displacement
So for the wheel to get from 22.4 to -22.4 with angular acceleration of -7.8 then the time it takes must be
When you first learn some information, the first place it goes in your brain is to your short-term memory. So, you read something, or hear something, and it stays in your short-term memory for a little while. If you don't hear it again, or that information doesn't get repeated, it is likely to disappear from your memory - you will forget it. However, the more you repeat that information, the more likely it is that it will be remembered, that is, it will enter your long-term memory and stay there for a long time.
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Answer:
(b) Gravitational interactions with Jupiter
Explanation:
Gaps in the asteroid belt also known as Kirkwood Gaps are caused by the gravitational interaction between Jupiter and asteriods with Jupiter's orbital period. These Jupiter's orbital period occurs in a simple fraction, such as half, one-third, quarter etc.
Therefore, the correct option is "b" Gravitational interactions with Jupiter.
Answer:
The magnitude of the stone velocity before it hits the ground is 30 m/s.
Explanation:
Given;
initial vertical velocity,
final vertical velocity, = 30 m/s
Apply the following kinematic equation to determine the height of the cliff;
Determine time of the journey;
h = vₓ + ¹/₂gt²
vₓ = 0 (initial horizontal velocity when the stone was thrown vertically downward)
h = ¹/₂gt²
t = √ (2h / g)
t = √ (2(40.82) / 9.8)
t = 2.89 s
When the rock is projected horizontally, the horizontal distance, x = 40.82 m
Initial horizontal velocity,
The final vertical component of the velocity is given by;
The magnitude of the stone velocity before it hits the ground is given by;
Therefore, the magnitude of the stone velocity before it hits the ground is 30 m/s.
Determine the magnitude of the acceleration for the speeding up phase<span>. Express your answer to two significant figures and include the appropriate units. I've tried 2.8 m/s^2, and 1.1 m/s^2, but they are both wrong. </span>Determine the magnitude of the acceleration<span> for the slowing down </span>phase<span>.</span>