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pav-90 [236]
3 years ago
11

If a car generates 18hp (which is 13428Watts) when traveling at a steady speed of 88km/h (which is 24.44m/s), what must be the a

verage force exerted on the car due to friction and air resistance?
Physics
2 answers:
Murrr4er [49]3 years ago
8 0
<span>Power = Force * Velocity </span>

<span>First convert to SI units: </span>
<span>88 km/h = 24.44 m/s </span>
<span>18 Hp = 13,428 Watts </span>

<span>Force = P/V = 549 newtons</span>
Arturiano [62]3 years ago
3 0

Answer:

Explanation:

549N

parameters given

power generated by car, P = 18hp =13428W

steady speed , S = 24.44m/s

force, F = ?

For a car that is moving with steady speed (constant). Power the car generates is what it used to overcome force of friction. so

P = F X S

making P the subject of the formula

F = P/S

using the SI unit

= 13428/24.44

F = 549N

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8 0
3 years ago
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A 2.2 m -long wire carries a current of 7.2 A and is immersed within a uniform magnetic field B⃗ . When this wire lies along the
zimovet [89]

Answer:

Explanation:

Given that :

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Force vector F = (2.6 i - 4.4 k) N

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Replacing 7.2 A for I ; -2.6 j N for F & 2.2 m i for L

-2.6 j N = (7.2 A)(2.2 m i *(B_xi + B_yj+B_zk)

-2.6 j N = 15.84B_z \ and  \ 0 = 15.84B_y

B_z = -0.1641T  \ and \ B_y = 0

However in y direction ; we have :

(2.6 i - 4.4 k) = 7.2 A (2.2 mi*(B_xi+B_yj+B_zk)

- 2.6 = 15.84 B_z \ and \ -4.4 = 15.84 B_x

B_z = -0.1641 T \ and \ B_x = -0.2778T

Hence, the component of magnetic field is as follows:

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What is the average velocity of a car if it travels from position 25m to a position of -7m in 34 seconds?
zubka84 [21]

Answer:

vp = 0.94 m/s

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