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lord [1]
2 years ago
14

How much time does it take the cheetah to travel 500 meters, if its average speed is 70 meters per second?

Physics
1 answer:
Whitepunk [10]2 years ago
6 0

Answer: 7.14

Explanation:

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A couple of astronauts agree to rendezvous in space after hours. Their plan is to let gravity bring them together. She has a mas
Oduvanchick [21]

Answer:

(a) Acceleration of female astronaut = 9.33*10^-12 m/s^2; Acceleration of male astronaut = 7.56*10^-12 m/s^2

(b) 27.013 days

(c) No, their accelerations would not be constant.

Explanation:

In the given question, we have:

Mass of female astronaut M_{1} = 60.0 kg

Mass of male astronaut M_{2} = 74.0 kg

Distance between them (S) = 23.0 m

(a) The free-body diagram is shown in the attached figure.

Using the equations below, the initial accelerations of the two astronauts can be calculated:

Force of gravity (F) = \frac{G*M_{1}*M_{2}}{S^{2} }

G = 6.67*10^-11 \frac{m^{3} }{kg*s^{2} }

F = (6.67*10^-11 *60*74)/23^2 = 5.598*10^-10 N

For the female astronaut, her initial acceleration = F/M_{1} = 5.598*10^-10/60 = 9.33*10^-12 m/s^2

For the male astronaut, his acceleration = F/M_{2} = 5.598*10^-10/74 = 7.56*10^-12 m/s^2

(b) Since the different between their mass is not much, we can deduce that:

a_{average} = \frac{a_{1}+a_{2}}{2} = (9.33*10^-12 + 7.56*10^-12)/2 = 8.445*10^-12 m/s^2

Using the equation below, we can calculate the the time:

S = ut + 1/2 (at^2)   where u = 0

23 = 1/2 (8.445*10^-12)*t^2

t^2 = 5.447*10^12

t = 2333883.044 s = 27.013 days

(c) No, their accelerations will not be constant. It will increase because their radii would be decreasing.

8 0
2 years ago
The density of this material is 2 g/cm3 there are 24 cm3 find the total mass
Fynjy0 [20]

Answer:

<h2>The answer is 48 g</h2>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 2 × 24

We have the final answer as

<h3>48 g</h3>

Hope this helps you

7 0
3 years ago
What is the basis for dividing the atmosphere into layers
Lina20 [59]
The atmosphere<span> can be </span>divided into<span> four </span>layers<span> based on temperature variations. The </span>layer<span> closest to the Earth is called the troposphere. Above this </span>layer<span> is the stratosphere, followed by the mesosphere, then the thermosphere.</span>
5 0
3 years ago
Please help with this question ASAP!!!
Paladinen [302]
The answer is the second choice

7 0
3 years ago
You push on a large crate with 500N of force. After 2 minutes you are exhausted and the crate hasn't moved. How much did you acc
inna [77]

Answer:

1,000 J

Explanation:

We will work this question out.

The crate has a mass of 500N.

You push for 2 minutes.

500N x 2 = 1,000 J

The answer to your question is 1,000 J.

6 0
2 years ago
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