Answer:
15,505 N
Explanation:
Using the principle of conservation of energy, the potential energy loss of the student equals the kinetic energy gain of the student
-ΔU = ΔK
-(U₂ - U₁) = K₂ - K₁ where U₁ = initial potential energy = mgh , U₂ = final potential energy = 0, K₁ = initial kinetic energy = 0 and K₂ = final kinetic energy = 1/2mv²
-(0 - mgh) = 1/2mv² - 0
mgh = 1/2mv² where m = mass of student = 70kg, h = height of platform = 1 m, g = acceleration due to gravity = 9.8 m/s² and v = final velocity of student as he hits the ground.
mgh = 1/2mv²
gh = 1/2v²
v² = 2gh
v = √(2gh)
v = √(2 × 9.8 m/s² × 1 m)
v = √(19.6 m²/s²)
v = 4.43 m/s
Upon impact on the ground and stopping, impulse I = Ft = m(v' - v) where F = force, t = time = 0.02 s, m =mass of student = 70 kg, v = initial velocity on impact = 4.43 m/s and v'= final velocity at stopping = 0 m/s
So Ft = m(v' - v)
F = m(v' - v)/t
substituting the values of the variables, we have
F = 70 kg(0 m/s - 4.43 m/s)/0.02 s
= 70 kg(- 4.43 m/s)/0.02 s
= -310.1 kgm/s ÷ 0.02 s
= -15,505 N
So, the force transmitted to her bones is 15,505 N
The upward force of the chain on the diamond would be the tension in the chain, and this tension would have to support the weight of the 45g that hangs from the chain.
mass = 45 g = 45/1000 kg = 0.045kg
Weight = mg = 0.045 * 10 ≈ 0.45N, g ≈ 10 m/s²
So the upward force is ≈ 0.45N.
The principle of moment can be verified when two known masses are suspended on a uniform meter rule.
<h3>What is principle of moment?</h3>
The principle of moment states that, the sum of clockwise moment is equal to the sum of the anticlockwise moment.
The principle of moment is verified when two known mass (m1 and m2) are suspended on a uniform meter rule.
The clockwise moment will be equal anticlockwise moment of the two masses.
Thus, the principle of moment can be verified when two known masses are suspended on a uniform meter rule.
Learn more about principle of moment here: brainly.com/question/20298772
The magnitude of the gravitational attraction is 
.
Explanation:
The magnitude of the gravitational force between two objects is given by
where
is the gravitational constant
m1, m2 are the masses of the two objects
r is the separation between them
In this problem, we have
is my mass
The mass of the mountain is 100 million tons, and keeping in mind that
1 ton = 1000 kg
The mass of the mountain is
The distance between me and the mountain is
r = 1 km = 1000 m
Therefore, the gravitational attraction is
Learn more about gravitational force here:
brainly.com/question/1724648
brainly.com/question/12785992
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Answer:
light travels in a straight line
Explanation:
the others are wrong
