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kkurt [141]
3 years ago
14

What is the meaning of smooth?

Physics
1 answer:
damaskus [11]3 years ago
5 0

A surface in which is flat or very soft to the touch and reduces splinters or anything sticking out, having an surface which does not have lumps, or indentations.

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brilliants [131]

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3 years ago
A 2000 kg car moving at 100 km/h crosses the top of a hill with a radius of curvature of 100 m. What is the normal force exerted
Tpy6a [65]

Answer:

The normal force the seat exerted on the driver is 125 N.

Explanation:

Given;

mass of the car, m = 2000 kg

speed of the car, u = 100 km/h = 27.78 m/s

radius of curvature of the hill, r = 100 m

mass of the driver, = 60 kg

The centripetal force of the driver at top of the hill is given as;

F_c = F_g - F_N

where;

Fc is the centripetal force

F_g is downward force due to weight of the driver

F_N is upward or normal force on the drive

F_N = F_g-F_c\\\\F_N = mg - \frac{mv^2}{r} \\\\F_N = (60 \times 9.8) -\frac{60 \ \times \ 27.78^2 \ }{100} \\\\F_N = 588 \ N - 463 \ N\\\\F_N = 125 \ N

Therefore, the normal force the seat exerted on the driver is 125 N.

6 0
3 years ago
A small boat is moving at a velocity of 3.35m/s when it is accelerated by a river current perpendicular to the initial direction
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Answer:

 v =7.1 m/s

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u=initial velocity

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Therefore the final velocity will be 7.1 m/s

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Scientists use what scale to compare the hardness of minerals?
frozen [14]
Mohs hardness scale. hope this helps
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3 years ago
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