You have DNA samples from five different suspects. You know that all humans have very similar DNA. What feature of DNA allows yo
1 answer:
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Answer:
6.21 m/s
Explanation:
Using work energy equation then
where d is displacement from initial to final position, v is velocity and subscripts a and b are position A and B respectively, m is mass of collar, g is acceleration due to gravity
Substituting 1 Kg for m, 0.4m for h, as 0, 9.81 for g then
Answer:
0.54454
104.00902 N
Explanation:
m = Mass of wheel = 100 kg
r = Radius = 0.52 m
t = Time taken = 6 seconds
= Final angular velocity
= Initial angular velocity
= Angular acceleration
Mass of inertia is given by
Angular acceleration is given by
Equation of rotational motion
The coefficient of friction is 0.54454
At r = 0.25 m
The force needed to stop the wheel is 104.00902 N