Physics, 11.12.2019 07:31 alliemeade1

What is the chance of a light car safely rounding an unbanked. curve on an icy road as compared to that of a heavy car: worse, the same, or better? assume that both cars have the same speed and are equipped with identical tires. account for your answer.

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Answer from: emmajobaby

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Both cars will move in the Same way

Explanation:

Moving on an unbanked icy road, the cars will have friction which will keep them from slipping on the icy road. This friction here is called Centripetal Force. The friction force due to which the tires roll and do not slip is the static friction μsN, (μs= coefficient of static friction , N= Normal Force which is equal to the weight of the car/body, so N=mg).

Now from above description, the centripetal force( $F_{c}$ ) becomes,

$F_{c}$ =f=μsN , (N=mg)

so , $F_{c}$ =μs(mg)

As we know the formula of centripetal force is

$F_{c}$ = m $v^{2}$ /r

Putting the value of $F_{c}$ from above

μs(mg) = m $v^{2}$ /r

cutting the 'm' from both sides, we get

μs(g) = $v^{2}$ /r

μs = $v^{2}$ /rg

we see from the derivation that there is no effect of mass on the cars, so in case of both cars having same speed and same tires, they will act in the same way resulting no effect of their masses on them

Answer from: Quest

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Answer from: Quest

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm. the wire diameter is d = 0.9 mm. the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2) in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

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