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ale4655 [162]
4 years ago
9

A 41.0 kg child is riding a playground merry-go-round that is rotating at 60.0 rev/min. What centripetal force (in N) is exerted

if he is 1.25 m from its center? (Enter the magnitude.)a-wood-floor-with-coefficient-of-static-friction-0/
Physics
1 answer:
Tatiana [17]4 years ago
3 0

Answer:505.94 N

Explanation:

Given

mass of child (m)=41 kg

N=60 rpm

\omega =\frac{2\pi N}{60}=4\pi rad/s

Radius(r)=1.25 m

and centripetal acceleration is given by m\omega ^2r

F_c=41\times (4\pi )^2\times 1.25=505.94 N

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A ship maneuvers to within 2.50 x 103 m of anisland's 1.80 x 103 m high mountain peak and fires aprojectile at an enemy ship 6.1
const2013 [10]

Answer:

Distance between peak height (vertically) of projectile and mountain height = (2975.2 - 1800) = 1175.2 m

Distance between where the projectile lands and ship B = (3188.8 - 3110) = 8.8 m

Explanation:

Given the velocity and angle of shot of the projectile, one can calculate the range and maximum height attained by the projectile.

H = (v₀² Sin²θ)/2g

v₀ = initial velocity of projectile = 2.50 × 10² m/s = 250 m/s

θ = 75°, g = 9.8 m/s²

H = 250² (Sin² 75)/(2 × 9.8) = 2975.2 m

Range of projectile

R = v₀² (sin2θ)/g

R = 250² (sin2×75)/9.8

R = 250² (sin 150)/9.8 = 3188.8 m

Height of mountain = 1.80 × 10³ = 1800 m

Maximum height of projectile = 2975.2 m

Distance between peak height (vertically) of projectile and mountain height = 2975.2 - 1800 = 1175.2 m

Distance of ship B from ship A = 2.5 × 10³ + 6.1 × 10² = 2500 + 610 = 3110 m

Range of projectile = 3188.8 m

Distance between where the projectile lands and ship B = 3188.8 - 3110 = 8.8 m

8 0
4 years ago
A car starts from rest and accelerates at a rate of 5 m/s2 for 5 seconds. What is the velocity of the car?
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Please find attached photograph for your answer.

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3 years ago
Please help!!<br> Thanks!!
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B. 200 N to the left.

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Select the correct answer. What happens to the molecules within a gas when the gas condenses?
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if a car, going 20 m/s with a mass of 1000kg hits a garbage can, what is the momentum of the can and the car afterwards?
pshichka [43]

Answer:

Momentum is the product of the mass and velocity of an object.

p = m \times v

p = 1000kg \times 20 \frac{m}{s}  = 20000kg \times  \frac{m}{s}

3 0
3 years ago
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