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trapecia [35]
3 years ago
13

A skydiver falls 3km in 15s. How fast are they going. i need my answer in meters! (20 PTS)

Physics
1 answer:
Alchen [17]3 years ago
8 0
Assume the skydiver falls down straight.

Then, as you ask how fast he falls, the answer will be, the speed is not constant.

The speed is proportional with gravitational acceleration g and time passes by.

In other words, v = gt = 9.8t
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Answer:

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A block, M1=10kg, slides down a smooth, curved incline of height 5m. It collides elastically with another block, M2=5kg, which i
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Answer:

2.86 m

Explanation:

Given:

M₁ = 10 kg

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\mu_k = 0.5

height, h = 5 m

distance traveled, s = 2 m

spring constant, k = 250 N/m

now,

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or

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or

u₁ = 9.89 m/s

let the velocity of second ball be v₂

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on substituting the values, we get

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now,

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Work done by the friction force = change in kinetic energy of the mass 2

or

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or

v₃ = 20.27 m/s

now, let the spring is compressed by the distance 'x'

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Energy of the spring =  Kinetic energy of the mass 2

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\frac{1}{2}kx^2=\frac{1}{2}mv_3^2

on substituting the values, we get

\frac{1}{2}\times250\times x^2=\frac{1}{2}\times5\times20.27^2

or

x = 2.86 m

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