The length of the ship in terms of Emily's equal steps is 84.
The given parameters;
- <em>equal steps forward = 210</em>
- <em>equal steps backward = 42</em>
Defined parameters:
- <em>Let the constant velocity of the ship = V</em>
- <em>Let the velocity of Emily = Vs</em>
- <em>Let the </em><em>length </em><em>of the </em><em>ship </em><em>= </em><em>d</em>
- <em>Let the time of motion, = t</em>
The velocity of Emily when moving forward in the direction of the ship:
The velocity of Emily when moving in opposite direction to the ship:
The constant velocity of the ship:
Apply relative velocity formula to determine the length of the ship:
<em>For </em><em>forward </em><em>(same direction) motion:</em>
<em>For </em><em>backward </em><em>(opposite direction) motion</em>:
Thus, we can conclude that the length of the ship in terms of Emily's equal steps is 84.
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Emily sees a ship traveling at a constant speed along a straight section of a river. She walks parallel to the riverbank at a uniform rate faster than the ship. She counts 210 equal steps walking from the back of the ship to the front. Walking in the opposite direction, she counts 42 steps of the same size from the front of the ship to the back. In terms of Emily's equal steps, what is the length of the ship
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Answer:
a) v=3.166 m/s
b) μ=0.0169
Explanation:
a)
The motion is totally inelastic collision so the mass of the person and the mass of the sled in the second part of the motion are add both.
b)
The motion have friction so the force and coefficient can be find using Newtons second law where
Answer:
Explanation:
Mass of small disc = m
radius of small disc = r
Mass of large disc = M
Radius of large disc = R
Initial angular speed = ωi
Let the final angular speed is ωf
As no external torque of applied on the system so the angular system remains constant.
I1 ωi = I2 ωf
MR^2 ωi = (MR^2 + mr^2) ωf
going to the toilet, and keeping cleant. no nasty bits floating around but they are weightless !
eating. pushing a fork would push back by newton 3. can't brace themselves to cut