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Mice21 [21]
3 years ago
11

A push or pull that causes an object's motion to change is called _____

Physics
1 answer:
12345 [234]3 years ago
6 0

Answer:

Force

Explanation:

Force is a pull or push that causes An objects motion to change . When force is applied to an object , it either pushes the object to or pulls it from something thereby changing the motion of the object. A good example is the earth’s gravitational force. This force pulls or attracts a body to the center of the earth . Another example Is experienced when kicking a football from one part of a football field to another. The ball is kicked with force and this causes it to move from one place another .

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A 55-kg woman is wearing high heels. If each heel has a circular cross-section 6.0 mm in diameter and she puts all her weight on
bogdanovich [222]

Answer:

The pressure exerted by the woman on the floor is 1.9061 x 10⁷ N/m²

Explanation:

Given;

mass of the woman, m = 55 kg

diameter of the circular heel, d = 6.0 mm

radius of the heel, r = 3.0 mm = 0.003 m

Cross-sectional area of the heel is given by;

A = πr²

A = π(0.003)²

A = 2.8278 x 10⁻⁵ m²

The weight of the woman is given by;

W = mg

W = 55 x 9.8

W = 539 N

The pressure exerted by the woman on the floor is given by;

P = F / A

P = W / A

P = 539 / (2.8278 x 10⁻⁵ )

P = 1.9061 x 10⁷ N/m²

Therefore, the pressure exerted by the woman on the floor is 1.9061 x 10⁷ N/m²

5 0
3 years ago
The potential energy stored in the compressed spring of a dart gun, with a spring constant of 31.50 N/m, is 1.240 J. Find by how
Ber [7]

Answer:

0.281  m

Explanation:

Applying,

W = 0.5ke².................. Equation 1

Where W = Workdone by the stretched spring, k = spring constant, e = extension/ compression of the spring

make e the subject of the equation

e = √(2W/k)................ Equation 2

From the question,

Given: W = 1.240J, k = 31.50 N/m

Substitute these values into equation 2

e = √(2×1.240/31.50)

e = √(0.07873)

e = 0.281  m

8 0
3 years ago
It would take almost 2 years for the fastest human-made spacecraft to travel from earth to europa. about how long would it take
worty [1.4K]
First, we need the distance of Europe and Wolf-359 from Earth.
- The distance of Europe from Earth is: d_E = 6.28 \cdot 10^8 km
- The distance of Wolf-359 from Earth is instead 7.795 light years. However, we need to convert this number into km. 1 light year is the distance covered by the light in 1 year. Keeping in mind that the speed of light is c=3 \cdot 10^8 m/s, and that in 1 year there are 
365 days x 24 hours x 60 minutes x 60 seconds = 3.154 \cdot 10^7 s/y, the distance between Wolf-359 and Earth is
d_W = 7.995 ly\cdot3\cdot 10^8 m/s \cdot 3.154 \cdot 10^7 s=7.38 \cdot 10^{16}m=7.38 \cdot 10^{13}km

Now we can calculate the time the spaceship needs to go to Wolf-359, by writing a simple proportion. In fact, we know that the spaceship takes 2 years to cover d_E, so
2 y:d_E = x:d_W
from which we find x, the time needed to reach Wolf-359:
x= \frac{2 y\cdot d_W}{d_E}=2.35 \cdot 10^5 years
4 0
3 years ago
All the different habitats in our world make up
nikdorinn [45]

Answer:

All the different habitats in our world make up biodiversity

Explanation:

Biodiversity is the sum of different species in life. With different species, it's diverse because it's more than one type.

Hope this helped!

4 0
3 years ago
Read 2 more answers
How are contact forces different from non-contact forces?
madam [21]
A non-contact force is a force which acts on an object without coming physically in contact with it. In contrast a contact force is a force which acts on an object coming physically in contact with it. ...
8 0
3 years ago
Read 2 more answers
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