Answer:
W = 1493.9 J = 1.49 KJ
Explanation:
The work done by the elevator on the object will be equal to the gain in is potential energy:
W = ΔP.E
W = mgΔh
where,
W = Work = ?
m = mass of object = 7.4 kg
g = 9.8 m/s²
Δh = gain in height = 20.6 m
Therefore,
W = (7.4 kg)(9.8 m/s²)(20.6 m)
<u>W = 1493.9 J = 1.49 KJ</u>
a). We could read off the period if we had the graph.
The frequency is 1/period.
b). The velocity is the first derivative of the displacement,
so it should lag the displacement by 90° .
The acceleration is the derivative of the velocity,
so that puts it 180° behind the displacement.
c). If we could see the graph, then, knowing the pendulum's
length and the period of its swing, we could calculate the
acceleration of gravity on the planet at which he is at.
The number of 'G-forces' is
9.8 m/s² / (acceleration of gravity where he is at) .
The number is a ratio ... without units.
Answer:
D. It can be Cyclic
Explanation:
Science has all different kinds of alike processes.
The scientific method is a generally and usually a Cyclical Process.
Answer:
2.75 m/s^2
Explanation:
The airplane's acceleration on the runway was 2.75 m/s^2
We can find the acceleration by using the equation: a = (v-u)/t
where a is acceleration, v is final velocity, u is initial velocity, and t is time.
In this case, v is 71 m/s, u is 0 m/s, and t is 26.1 s Therefore: a = (71-0)/26.1
a = 2.75 m/s^2
Answer:
The equator has the greatest linear speed
(rotational, linear) speed varies.