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asambeis [7]
3 years ago
7

Help me with this plzzz

Physics
2 answers:
Ksenya-84 [330]3 years ago
6 0
Assuming that there is no wind or air resistance, the acceleration due to gravity will remain the same. (9.81m/s^2) therefore B is out.

Potential energy is stored energy. Meaning, that when something is in motion, it will decrease and kinetic energy will increase.

A is correct
Marysya12 [62]3 years ago
4 0

Answer:

yeah I'm Pretty sure it's b

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A man jogs at a speed of 1.6 m/s. His dog waits 1.8 s and then takes off running at a speed of 3 m/s to catch the man. How far w
inessss [21]

Answer:

The dog catches up with the man 6.1714m later.

Explanation:

The first thing to take into account is the speed formula. It is v=\frac{d}{t}, where v is speed, d is distance and t is time. From this formula, we can get the distance formula by finding d, it is d=v\cdot t

Now, the distance equation for the man would be:

d_{man}=v_{man}\cdot t=1.6\cdot t

The distance equation for the dog would be obtained by the same way with just a little detail. The dog takes off running 1.8s after the man did. So, in the equation we must subtract 1.8 from t.

d_{dog}=v_{dog}\cdot (t-1.8)=3\cdot (t-1.8)

For a better understanding, at t=1.8 the dog must be in d=0. Let's verify:

d_{dog}=v_{dog}\cdot (1.8-1.8)=3\cdot (0)=0

Now, for finding how far they have each traveled when the dog catches up with the man we must match the equations of each one.

d_{man}=d_{dog}

1.6\cdot t=3\cdot (t-1.8)

1.6\cdot t=3\cdot t-5.4

1.4\cdot t=5.4

t=\frac{5.4}{1.4}

t=3.8571s

The result obtained previously means that the dog catches up with the man 3.8571s after the man started running.

That value is used in the man's distance equation.

d_{man}=1.6\cdot t=1.6\cdot (3.8571)

d_{man}=6.1714m

Finally, the dog catches up with the man 6.1714m later.

6 0
3 years ago
What is the scientific meaning of energy?
JulijaS [17]

Answer:

it is B

Explanation:

8 0
2 years ago
5kg of copper ball and I kg of water are at the same temperature of 31 C. Which
blagie [28]

Answer:

r

Explanation:

8 0
3 years ago
Sound produced when sections of a string vibrate separately are called
sergiy2304 [10]
Lungs vacoules on if those 2
5 0
2 years ago
An electroplating solution is made up of nickel(II) sulfate. How much time would it take to deposit 0.500 g of metallic nickel o
ELEN [110]

Answer:

1.52 hour

Explanation:

M = 0.5 g, I = 3 A

Electrochemical equivalent of nickel

Z = 3.04 × 10^(-4) g/C

By use of Faraday's laws of electrolysis

M = Z I t

t = M / Z I

t = 0.5 / (3.04 × 10^-4 × 3)

t = 5482.45 second = 1.52 hour

6 0
3 years ago
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