F = 20 N
Impulse, I = 5 Kg.m/s
time of contact, t = 0.25 s
Average force = ?
we know force is equal to change of momentum per unit time.
impulse is equal to change in momentum.
The average force exerted by the person on the box is equal to F = 20 N
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Incomplete Dominance: In this case, the 3rd different phenotype is created by the heterozygous(CwCr) (for example, pink)
Co-Dominance: the heterozygous is observed to show both the homozygous conditions (for example the blood type iAiB shows both A and B carbohydrates)
Multiple alleles: This is when a gene has over 2 alleles (i.e. blood has ia ib i)
Polygenic inheritance: This is when over two different gene leads to the expression of a trait.
Pleiotropy: This is the when a gene shows several effects on an organism.
Epistasis: This is when more than one gene have strong control on the expression of a trait (for example, E/e allele creates pigments)
Sex-linkage: This refers to the genes found in sex chromosomes
Gene Linkage: These are the genes situated in a similar chromosome.
A) F = 705 N
B) a = 1.23 m/s²
The mass of the person and bucket, m = 72 Kg
The tension, T = 0
The bucket pulley apparatus works with the principle of Atwood's machine
The upward acceleration is equal to the downward acceleration. It is denoted by 'a
The acceleration due to gravity is 'g'
The net force in the upward direction, f = T - mg ( f = ma) N
The net force in the downward direction is, F = Mg -T (F = Ma) N
The upward acceleration is equal to the downward acceleration. It is denoted by a
Adding the above equations
Mg -mg = ma + Ma
mg = 72g N
= 105 N
To remain equilibrium or to raise herself slowly at a constant speed, the upward force should be equal to the downward force.
Mg = mg
Therefore, the force required to raise herself slowly at a constant speed is 705 N
If she increases this force by 15%,
(100/72g) x 15 %
Therefore, the total downward force, F = 62g+20.83g
= 92.83g N
Substituting the values in the equation
Mg -mg = Ma + ma
92.83g - 72g = (92.83g + 72g) a
a = 92.83g - 72g / 92.83 + 72g
= 1.23 m/s²
Hence the acceleration will be, a = 1.23 m/s²