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dedylja [7]
3 years ago
13

A roller coaster track is 3000 meters long. It takes 100 seconds to travel once around the roller coaster. What is the average s

peed of the roller coast? Is the velocity constant throughout the trip? Explain
Physics
2 answers:
Svetllana [295]3 years ago
6 0
All you have to do is divide 3000 by 100, Its 30
mina [271]3 years ago
6 0

<u>Answer:</u> The average speed of the roller coast is 30 m/s

<u>Explanation:</u>

Average speed is defined as the ratio of total distance traveled to the total time taken.

To calculate the average speed of the runner, we use the equation:

\text{Average speed}=\frac{\text{Total distance traveled}}{\text{Total time taken}}

We are given:

Total distance traveled by roller coast = 3000 m

Total time taken = 100 seconds

Putting values in above equation, we get:

\text{Average speed of roller coast}=\frac{3000m}{100s}=30m/s

Hence, the average speed of the roller coast is 30 m/s

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If<br> f(x) = 5x - 20<br> find f(y +2)
olga2289 [7]

Answer:

f(y)=2

Explanation:

5x/5-20/5

x=4

f(y+2)=4

    -2   -2

f(y)=2

8 0
3 years ago
A grocery shopper tosses a(n) 9.0 kg bag of rice into a stationary 17.4 kg grocery cart. The bag hits the cart with a horizontal
noname [10]

Answer:

V=1.77m/s

Explanation:

#Using the conservation of momentum , momentum before equals momentum after(p=mv).

-Initial speed is 5.2m/s while the cart is at rest. After, the velocity will be of a combined(bag+cart) mass.

Hence:

9.0\times 5.2+17.4\times 0=(9+17.4)V\\\\V=\frac{9\times5.2}{9+17.4}\\\\=1.77m/s\\

Hence, the final velocity of the cart and bag is 1.77m/s

7 0
4 years ago
Which of these is an example of physical weathering? Rock breaking up due to carbonic acid Rock breaking up due to mechanical fo
neonofarm [45]

Answer:

Biological weathering

Explanation:

7 0
3 years ago
One of the games at a carnival involves trying to ring a bell with a ball by hitting a lever that propels the ball into the air.
RoseWind [281]

Answer:

Ball will not hit bell.

Explanation:

The height of the ball is modeled by the equation h(t)= -16t²+39t

We need to find if the bell is 25 ft above the ground, will it be hit by the ball.

So we need to find maximum height of the ball.

For maximum height we have

                   \frac{dh}{dt}=0\\\\\frac{d}{dt}\left ( -16t^2+39t\right )=0\\\\-32t+39=0\\\\t=1.22s

Substituting in h(t) = -16t²+39t

Maximum height reached = h(1.22) = -16 x 1.22²+39 x 1.22 = 23.77 ft

So maximum height reached is less than height of bell.

Ball will not hit bell.

8 0
3 years ago
A 20.0-µF capacitor is charged by a 150.0-V power supply, then disconnected from the power and connected in series with a 0.280
natali 33 [55]

Answer

given,

Capacitance of capacitor = 20.0-µF

Voltage =  150.0-V

inductance = 0.280 m H

a) the oscillation frequency of circuit

f = \dfrac{1}{2\pi}\ sqrt{\dfrac{1}{LC}}

f = \dfrac{1}{2\pi}\ sqrt{\dfrac{1}{0.280 \times 10^{-3}\times 20 \times 10^{-6}}}

f = 2126.9 Hz

b) U = \dfrac{1}{2}CV^2

   U = \dfrac{1}{2}(20\times 10^{-6})(150)^2

         U = 0.225 J

c)Current in the inductor

    V = L \dfrac{dI}{dt}

    150 = 0.28 \times 10^{-3} \dfrac{dI}{dt}

    \dfrac{dI}{dt} = 535714

instantaneous rate of change of current is equal to 535714 A/s

 

7 0
3 years ago
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