Answer:
Explanation:
Given that,
Mass of astronaut
M = 62kg
Mass of wrench
m = 3.3kg
Speed at which wrench move away from the capsule
v = 20.5m/s
Speed of astronaut?
Let speed of astronaut be V
Since there is no external force, we would apply conservation of momentum
Momentum of the astronaut is equal to the momentum of the wrench
Momentum is given as
P = Mass × Velocity
P(astronaut) = P(wrench)
M×V = m×v
V = m×v/M
V = 3.3×20.5/62
V = 1.09 m/s
The astronaut speed is 1.09m/s
Answer:
(a) α = -0.16 rad/s²
(b) t = 33.2 s
Explanation:
(a)
Applying 3rd equation of motion on the circular motion of the tire:
2αθ = ωf² - ωi²
where,
α = angular acceleration = ?
ωf = final angular velocity = 0 rad/s (tire finally stops)
ωi = initial angular velocity = 5.45 rad/s
θ = Angular Displacement = (14.4 rev)(2π rad/1 rev) = 28.8π rad
Therefore,
2(α)(28.8π rad) = (0 rad/s)² - (5.45 rad/s)²
α = -(29.7 rad²/s²)/(57.6π rad)
<u>α = -0.16 rad/s²</u>
<u>Negative sign shows deceleration</u>
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(b)
Now, we apply 1st equation of motion:
ωf = ωi + αt
0 rad/s = 5.45 rad/s + (-0.16 rad/s²)t
t = (5.45 rad/s)/(0.16 rad/s²)
<u>t = 33.2 s</u>
<span>If two wheels are exactly the same but spin at different speeds, wheel b is twice te speed of wheel a, it is possible to find the ratio of the magnitude of radial acceleration at a singular point of the rim on wheel be to the spot is four.</span>
It stops accelerating when the air resistance is equal to its weight.
That's (m•g)
= (2 kg) • (9.8 m/s^2)
= 19.6 newtons
Answer:
I thought "Born Without a Heart" was pretty good.
Hi
Explanation:
