The initial speed of the sled at the given height is 4.85 m/s.
<h3>Initial speed of the sled</h3>
Apply the principle of conservation of energy;
K.E = P.E
¹/₂mv² = mgh
v² = 2gh
v = √2gh
where;
- h is the vertical height reached
- g is acceleration due to gravity
v = √(2 x 9.8 x 1.2)
v = 4.85 m/s
Thus, the initial speed of the sled at the given height is 4.85 m/s.
Learn more about initial speed here: brainly.com/question/24493758
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Answer:
Part a)

Part b)

Explanation:
Part a)
During the launch
speed will increase from rest to final speed of 1.60 m/s
the distance moved by it is given as

now we have


so we have


now in terms of g it is given as

Part b)
During speed reduction
we know that final speed will be zero by air in distance 1.30 mm
so we have

![0 - 1.60^2 = 2(a)(1.30 \times 10^{-3})/tex][tex]a = 984.6 m/s^2](https://tex.z-dn.net/?f=0%20-%201.60%5E2%20%3D%202%28a%29%281.30%20%5Ctimes%2010%5E%7B-3%7D%29%2Ftex%5D%3C%2Fp%3E%3Cp%3E%5Btex%5Da%20%3D%20984.6%20m%2Fs%5E2)
Now in terms of g it is

Answer:
Inertia! I hope this helps!
Answer:
R = 0.0015Ω
Explanation:
The formula for calculating the resistivity of a material is expressed as;
ρ = RA/l
R is the resistance
ρ is the resistivity
A is the area of the wire
l is the length of the wire
Given
l = 85cm = 0.85m
A = πr²
A = 3.14*0.0018²
A = 0.0000101736m²
ρ = 1.75 × 10-8Ωm.
Substitute into the formula
1.75 × 10-8 = 0.0000101736R/0.85
1.4875× 10-8 = 0.0000101736R
R = 1.4875× 10-8/0.0000101736
R = 0.0015Ω
Answer:
35000 KJ
Explanation:
The equation for the kinetic energy is given by the formula :


OR
Units will be kilojoules since the units of mass was kilograms .
Our final answer is 35000 KJ
Hope this helped and have a good day