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Phantasy [73]
3 years ago
8

A 5kg wheel rolls off a flat roof of a 50 m tall building at 12m/s.

Physics
1 answer:
Olegator [25]3 years ago
6 0

Explanation:

a) Given in the y direction (taking down to be positive):

Δy = 50 m

v₀ = 0 m/s

a = 10 m/s²

Find: t

Δy = v₀ t + ½ at²

50 m = (0 m/s) t + ½ (10 m/s²) t²

t = 3.2 s

b) Given in the x direction:

v₀ = 12 m/s

a = 0 m/s²

t = 3.2 s

Find: Δx

Δx = v₀ t + ½ at²

Δx = (12 m/s) (3.2 s) + ½ (0 m/s²) (3.2 s)²

Δx = 38 m

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The recoil speed of Astronaut A is 0.26 m/s.            

Explanation:

Given that,

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mass of the red car, m₂ = 3 kg

initial velocity of the red car, u₂ = 2 m/s

let the blue car moving to the right be in positive direction

also, let the red car moving to the left be in negative direction

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Therefore, their velocity after the collision is 1.2 m/s, to the right.

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