Physics: A Tesla Model S (with a mass of 2.2 x 103 kg) can accelerate from rest to 60 mph (27 m/s) on a horizontal track in 2.4 seconds. a.Calculate the KEf b.Calculate its power in Watts and in horsepower (1.0 hp = 745 W)

5833.33Explanation: = Angular acceleration = Number of revolutions = Initial angular speed = 0t = Time taken = 2 sFinal angular speedFrom the equation of rotational motion we haveThe number of revolutions is 5833.33...

A Tesla Model S (with a mass of 2.2 x 103 kg) - id2210310895421, musicismylove2340

Ответ:

sjeueujs2067

18.03.2022

Physics

See the answers below.

Explanation:

a) KEf, This term refers to the final kinetic energy i.e. when the velocity has reached 27 [m/s].

To calculate this energy we must use the following equation that relates velocity and mass to kinetic energy.

$E_{kin}=\frac{1}{2} * m*v^{2}$

where:

m = mass = 2.2*10³[kg]

v = velocity = 27 [m/s]

$E_{kin}=\frac{1}{2} *2.2*10^{3}*(27)^{2}\\E_{kin}=801900[J]$

Power is defined as the amount of energy or work done over a certain time, it can be calculated by means of the following equation.

$P=E_{kin}/t$

where:

t = time = 2.4 [s]

P = Power [W]

Now replacing:

$P=801900/2.4\\P=334125[W]\\Now in Hp\\334125[w]*\frac{1hp}{745w} \\= 448.5[hp]$

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Ответ:

sgillespie006p3ute8

16.12.2021

Physics

5833.33

Explanation:

$\alpha$ = Angular acceleration

$\theta$ = Number of revolutions

$\omega_i$ = Initial angular speed = 0

t = Time taken = 2 s

Final angular speed

$\omega_f=\dfrac{350000}{60}=5833.33\ rps$

From the equation of rotational motion we have

$\omega_f=\omega_i+\alpha t\\\Rightarrow \alpha=\dfrac{\omega_f-\omega_i}{t}\\\Rightarrow \alpha=\dfrac{5833.33-0}{2}\\\Rightarrow \alpha=2916.665\ rev/s^2$

$\theta=\omega_it+\dfrac{1}{2}\alpha t^2\\\Rightarrow \theta=0\times t+\dfrac{1}{2}\times 2916.665\times 2^2\\\Rightarrow \theta=5833.33\ rev$

The number of revolutions is 5833.33

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A Tesla Model S (with a mass of 2.2 x 103 kg) can accelerate from rest to 60 mph (27 m/s) on a horizontal track in 2.4 seconds.

a.Calculate the KEf

b.Calculate its power in Watts and in horsepower (1.0 hp = 745 W)

Ответ:

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