Integrated Science- 8th grade science
2 answers:
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Answer:
Explanation:
Given:
- mass of John,
- mass of William,
- length of slide,
(A)
height between John and William,
<u>Using the equation of motion:</u>
where:
v_J = final velocity of John at the end of the slide
u_J = initial velocity of John at the top of the slide = 0
Now putting respective :
<u>Now using the law of conservation of momentum at the bottom of the slide:</u>
<em>Sum of initial momentum of kids before & after collision must be equal.</em>
where: v = velocity with which they move together after collision
is the velocity with which they leave the slide.
(B)
- frictional force due to mud,
<u>Now we find the force along the slide due to the body weight:</u>
<em><u>Hence the net force along the slide:</u></em>
<em>Now the acceleration of John:</em>
<u>Now the new velocity:</u>
Hence the new velocity is slower by
