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4 years ago

8

A children’s roller coaster is released from the top of a track. If it’s maximum speed at ground level is 8 m/s, find the height

it was released from

1 answer:

cupoosta [38]4 years ago

4 0

Answer:

80 miles per 80 miles per hour so Likud those up So the kid throws up

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A 6.00-kg crate is suspended from the end of a short vertical rope of negligible mass. An upward force F(t) is applied to the en

timofeeve [1]

Answer:

The magnitude of F when t=4 s=146.64 N

Explanation:

We are given that

Mass of crate,m=6.00 kg

Height of crate above its initial position is given by

$y(t)=(2.80 m/s)t+(0.610 m/s^3)t^3$

We have to find the magnitude of F when t=4.00 s

Differentiate w.r.t t

$\frac{dy}{dt]=2.8+3(0.61)t^2$

$\frac{d^2y}{dt^2}=6(0.61)t$

$a(t)=\frac{d^2y}{dt^2}=6(0.61)t m/s$

$a(4)=6(0.61)(4)=14.64 m/s^2$

Now, magnitude of force

$F=m(a+g)=6(14.64+9.8)=146.64N$

Hence, the magnitude of F when t=4 s=146.64 N

4 0

3 years ago

Yanni just turned one. He loves to play with his cars and trucks. He can also name the animals he sees in books.

Liula [17]

Infancy
i think hope this helps

8 0

3 years ago

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A machine lifts a 35 kg object doing 6860 J worth of work. How much power is produced by the machine if it lifts the object in 4

timofeeve [1]

Answer:

Explanation:

We need the power equation for this which is

P = Work/time

We have everything we need to solve this (the mass of the object is extra information):

P = 6860/4

P = 1715W

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3 years ago

Children are ready for more complex storybooks:

FromTheMoon [43]

Answer:

4

Explanation:

Because that is when they're mind learns how to read

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3 years ago

What kinds of space and matter can light travel through

dem82 [27]

Answer:

Light travels as a wave. But unlike sound waves or water waves, it does not need any matter or material to carry its energy along. This means that light can travel through a vacuum—a completely airless space. (Sound, on the other hand, must travel through a solid, a liquid, or a gas.)

Explanation:

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3 years ago

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