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alexgriva [62]
2 years ago
14

Alonzo sprints for 500 meters along a straight track during a race. After crossing the finish line, he to walks back along the t

rack for 50 meters to cool down. What is Alonzo's displacement? 450 meters, straight ahead 500 meters, straight ahead 550 meters, straight ahead
Physics
2 answers:
Nata [24]2 years ago
6 0
450 meters, straight ahead is the answer.
allsm [11]2 years ago
3 0

Answer:

450 meters straight ahead

Explanation:

As we know that displacement is the total vector displacement of the object from initial point to final point

As here the Alonzo moves in a straight line during the finish line which is at distance of 500 m

so initial displacement is given as

d_1 = 500 m

now for cool down he again moves back 50 meter along the same track in backward direction

so it is given as

d_2 = -50 m

so we can say that total displacement will be

d = 500 - 50 = 450 m straight ahead

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-Dominant- [34]

The car would go from  zero to 58.0 mph in 2.6 sec.

Since the force on the car is constant, therefore the acceleration of the car would also be constant.

Now for constant acceleration we can use the equation of motion

Using first equation of motion to calculate the acceleration of the car

v=u+at

29=0+a×1.30       ...... Eq. (1)

Again using the first equation of motion

58=0+a*t             ....... Eq. (2)

Dividing eq. (2) with equation 1

t=2×1.3

t=2.6 sec

7 0
2 years ago
A 70kg man runs at a pace of 4 m/s and a 50g meteor travels at 2 km/s. Which has the most kinetic energy?.
kirill115 [55]

Answer:

the 70kg man

Explanation:

because he has more weight and is moving faster

4 0
2 years ago
On a snowy day, max (mass = 15 kg) pulls his little sister maya in a sled (combined mass = 20 kg) through the slippery snow. max
sesenic [268]

Work done by a given force is given by

W = F.d

here on sled two forces will do work

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2. Frictional force due to ground

Now by force diagram of sled we can see the angle of force and displacement

work done by Max = W_1 = Fdcos\theta

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Now similarly work done by frictional force

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Now total work done on sled

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7 0
2 years ago
Two resistors of 5.0 and 9.0 ohm are connected in parallel. A 4.0 ohm resistor is then connected in series with the parallel com
rewona [7]

Answer:

I1 = 0.772 A

Explanation:

<u>Given</u>: R1 = 5.0 ohm, R2 = 9.0 ohm, R3 = 4.0 ohm, V = 6.0 Volts

<u>To find</u>:  current I = ? A

<u>Solution: </u>

Ohm's law  V= I R

⇒   I = V / R

In order to find R (total) we first find R (p) fro parallel combination. so

1 / R (p) = 1 / R1  + 1/ R2          ∴(P) stand for parallel

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R (p) = 3.214 ohm

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This the total current supplied by 6 volts battery.

as voltage drop across R (p) = V = R (p) × I (total)

V (p) = 3.214 ohm × 1.202 A  = 3.864 volts

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I1 = 3.864 volts / 5 ohm

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3 0
2 years ago
Differences between Pressure and upthrust​
Angelina_Jolie [31]

Answer:

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4 0
2 years ago
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