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liraira [26]
2 years ago
10

A girl runs south 10 meters then turns around and walks back 3 meters

Physics
1 answer:
Svetlanka [38]2 years ago
6 0

Answer:

12

Explanation:

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sjdide

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An elevator weighs 1500 Newtons. Calculate how much potential energy it has when it is lived 500 meters in the air.
avanturin [10]

An elevator has 750,000 J when it is lived 500 meters in the air

Answer: Option D

<u>Explanation:</u>

The expression to find the potential energy completely on the basis of forces that on two objects. It can be written as

potential\ energy (P . E)=m \times acceleration\ due\ to\ gravity\ (g) \times height (h)

Where,

m – mass of object

Acceleration due to gravity =  9.8 \mathrm{m} / \mathrm{s}^{2}

h = 500 meters

Force = 1500 Newton

As we know, according to Newton second law of motion, the force can be expressed in terms of mass and gravity (F= ma). So, the potential energy can be calculated as

P . E=F \times h=1500(500)=750000 J

Hence, an elevator has 750,000 J when it is lived 500 meters in the air.

4 0
3 years ago
If you place a balloon in the freezer, it will __________.
tester [92]
The answer is "Deflate because volume is directly proportional to temperature"
5 0
3 years ago
Read 2 more answers
Arwan finds a piece of quartz while hiking in the mountains. When he returns to school, he takes it to his science teacher. She
bekas [8.4K]

it's 303.4 cm3. i just took the test

8 0
2 years ago
Read 2 more answers
An object is moving with a constant velocity of 278 m/s. How long will it take it to travel 7500 m, using the formula Delta X=Vt
rusak2 [61]
If the velocity is constant then the acceleration of the object is zero.
a=0 (m/s^2)
Thus when we apply the equation
\Delta X=vt+(at^2/2)
It remains
\Delta X =vt
or equivalent
t=(\Delta X/v) =7500/278 =26.98 (seconds)

7 0
3 years ago
Can someone help??
Paul [167]

Answer:

F = 2520 N

Explanation:

We have,

The maximum acceleration of a fist in a karate punch is 4200 m/s². The mass of the fist is 0.6 kg.

It is required to find the force that the wood place on the fist. Force is given by the product of mass and its acceleration such that,

F = ma

F=0.6\times 4200\\\\F=2520\ N

So, the force of 2520 N is acting on the wood.

8 0
3 years ago
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