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3 years ago

What is the acceleration experiance by a car that takes 10s to reach 27m/s from rest

1 answer:

lina2011 [118]3 years ago

4 0

Magnitude of acceleration = (change in speed) / (time for the change).

Change in speed = (27 - 0) = 27 m/s
Time for the change = 10 s

Magnitude of acceleration = (27 m/s) / (10 s) = 2.7 m/s² .

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A 45.2-kg person is on a barrel ride at an amusement park. She stands on a platform with her back to the barrel wall. The 3.74-m

elena-14-01-66 [18.8K]

Answer:

1,230N

Explanation:

1. Name of the variables:

$f:frequency\\\\ \omega:angular\text{ }speed\\\\ a_c:centripetal\text{ }acceleration\\\\ F_c:centripetal\text{ }force\\ \\ m:mass\\ \\ d:diameter\\ \\ r:radius\\ \\ g:gravitational\text{ }acceleration$

2. Formulae:

$f=\dfrac{number\text{ }of\text{ }revolutions}{time}$

$\omega=2\pi f$

$a_c=\omega^2 r$

$F_c=m\times a_c$

3. Solution (calculations)

$f=\dfrac{1}{1.65s}=0.\overline{60}s^{-1}$

$\omega=2\pi\times0.\overline{60}\approx 3.808rad/s$

$a_c=(3.808rad/s)^2\times (3.74/2m)=27.12m/s^2$

$F_c=45.2kg\times27.12m/s^2=1,225.67N\approx 1,230N$

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3 years ago

What is gravitational force

Salsk061 [2.6K]

Gravitational forces are forces of attraction. It's like the Earth pulling on you and keeping you on the ground.

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3 years ago

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An oscillating block-spring system has a mechanical energy of 4.72 J, an amplitude of 11.2 cm, and a maximum speed of 4.24 m/s.

dsp73

Answer:

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3 years ago

All objects _ energy.

Alekssandra [29.7K]

Answer:

Explanation:

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3 years ago

what device is made of coils of wire with an electrical current passing through it in order to generate a magnetic field

Umnica [9.8K]

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Explanation:

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1. Step up transformer - increases voltage

2. Step down transformer - decreases voltage

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3 years ago