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Zolol [24]
4 years ago
14

Alexander has a mass of 70 kilograms. his apartment is on the second floor. 5 meters yo from ground level . How much work does h

e do against gravity each time he climbs the stairs to his apartment.
Physics
1 answer:
navik [9.2K]4 years ago
7 0

potential energy gain = work done by alexander

PE=mass*gravity * height

PE=70kg*9.81*5=3433.5

take g=9.81

answer =3433.5

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Answer:

The speed with which the man flies forward is 5.5 m/s

Explanation:

The mass of the man = 100 kg

The mass of the scooter = 10 kg

The speed with which the man was traveling on the scooter = 5 m/s

The speed of the scooter after it hits the rock = 0 m/s

Let v represent the speed with which the man flies forward

The formula for momentum, P, is P = Mass × Velocity

The conservation of linear momentum principle is, the total initial momentum = The total final momentum, therefore, we have;

The total initial momentum = (100 kg + 10 kg) × 5 m/s = 550 kg·m/s

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When the momentum is conserved, we have;

550 kg·m/s = 100 kg × v

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current, only

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A pair of slits separated by 1 mm, are illuminated with monochromatic light of wavelength 411 nm. The light falls on a screen 1.
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t = 0.192 \mu m

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