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valina [46]
3 years ago
11

The 1350-kg car has a velocity of 24 km/h up the 8-percent grade when the driver applies more power for 18 s to bring the car up

to a speed of 65 km/h. Calculate the time average F of the total force tangent to the road exerted on the tires during the 18 s. Treat the car as a particle and neglect air resistance.
Physics
1 answer:
Brrunno [24]3 years ago
4 0

Answer:

Explanation:

We shall apply concept of impulse to solve the problem  .

Impulse = force x time

impulse = change in momentum

force x time = change in momentum

initial speed u = 24 km/h = 6.67 m /s

final speed v = 65 km/h = 18.05 m /s

change in momentum = m v - mu

= m ( v-u )

= 1350 ( 18.05 - 6.67 )

= 15363 kg m/s

F x 18 = 15363

F = 853.5 N .

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Two conducting spheres are each given a charge Q. The radius of the larger sphere is three times greater than that of the smalle
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Answer:

Explanation:

If E₀ is the electric field outside the smaller sphere and r is the radius of larger sphere.

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A 1000-kg car is traveling east at 20\:m.s^{-1}20 m . s − 1 and a 1200-kg car is traveling west at 22\:m.s^{-1}\:22 m . s − 1. W
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Answer:

490,400 J

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The answer is the letter "C" ( I have honors science I am good at this type of stuff )

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