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Elza [17]
3 years ago
5

A gray kangaroo can bound across a flat stretch of ground with each jump carrying it 11 m from the takeoff point. part a if the

kangaroo leaves the ground at a 21 ∘ angle, what is its takeoff speed
Physics
2 answers:
jeka943 years ago
8 0
<span>Each jump = 11 m
 Angle of the speed = 21 degrees.
Gravitational Acceleration g = 9.8 m/s^2
  Initial velocity V^2 = (Rg)/sin2A
 V^2 = 11 x 9.81 / sin (2 x 21)
 V^2 = 107. 91 / 0.669
 V^2 = 161.27
 V = 12.70
Now we got the velocity and calculate the horizontal angle, Velocity (horizontal) = vcosA = 12.70 x cos 21 Velocity = 11.85 m/s</span>
Svetllana [295]3 years ago
6 0
We have that the maximum rank of the kangaroo is given by:
 R = v0 ^ 2 sin (2θ) / g
 where,
 v0 = initial velocity
 θ = angle of the velocity vector formed from the horizontal
 g = gravity
 Clearing the speed we have:
 v0 ^ 2 = (R * g) / (sin (2θ))
 Substituting values
 v0 = root (((11) * (9.8)) / (sin (2 (21 * (pi / 180)))))
 v0 = 12.69 m / s
 answer
 its takeoff speed is 12.69 m / s
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Eduardwww [97]

This question apparently wants you to get comfortable
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c = 3 x 10⁸ m/s
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                           1.03 x 10⁻¹³ joule  =  (m) (3 x 10⁸ m/s)²

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                                   =  (1.03 / 9) x (10⁻¹³ ⁻ ¹⁶) (kg)

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______________________________________

Something like this could have been much more impressive:
 
The Braidwood Nuclear Power Generating Station in northeastern
Ilinois USA serves Chicago and northern Illinois with electricity.
<span>The station has two pressurized water reactors, which can generate
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nuclear plant in the state.
If the Braidwood plant were able to completely convert mass
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operating at full capacity ?

Energy = (2,242 x 10⁶ joule/sec) x (86,400 sec/day) x (365 da/yr)

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             =          7.0704 x 10¹⁶ joules .

How much converted mass is that ?

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Divide each side by  c² :    Mass  =  E / c² .
c = 3 x 10⁸ m/s

              Mass = (7.0704 x 10¹⁶ joules) / (9 x 10¹⁶ m²/s²)

                        =        0.786 kilogram ! ! !

THAT should impress us !  If I've done the arithmetic correctly,
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</span>
7 0
3 years ago
Read 2 more answers
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6 0
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