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disa [49]
3 years ago
10

I will fan and give 2 medals!!!!!!!!!!!

Physics
1 answer:
IgorC [24]3 years ago
6 0
Anything can happen once. You want to be able to show consistency and have more people confirm your answer
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An athlete stretches a spring an extra 40.0 cm beyond its initial length. how much energy has he transferred to the spring, if t
marissa [1.9K]
The energy transferred to the spring is given by:
U= \frac{1}{2}kx^2
where 
k is the spring constant
x is the elongation of the spring with respect its initial length

Let's convert the data into the SI units:
k=52.9 N/cm = 5290 N/m
x=40.0 cm=0.4 m

so now we can use these data inside the equation ,to find the energy transferred to the spring:
U= \frac{1}{2}kx^2= \frac{1}{2}(5290 N/m)(0.4m)^2=423.2 J
4 0
3 years ago
How does acceleration due to gravity changes wit depth?
ivann1987 [24]

Decreases

Explanation:

The acceleration due to gravity on a body decreases with depth.

Acceleration due to gravity is the change in velocity with time of a body as result of the pull of gravity or gravitational force.

  • The acceleration due to gravity tend to pull all bodies to the center of the earth.
  • As body moves away from the center of the earth, the pull becomes very more and acceleration increase.
  • But when a body approaches the center of the earth, the acceleration reduces.
  • At depth, the acceleration due to body of a body begins to decrease.

learn more:

Gravity brainly.com/question/10934170

#learn more brainly.com/question/10934170

#learnwithBrainly

7 0
3 years ago
A car is moving with a speed of 15 ms. How long does it take to cover a distance<br>of 1.2 km?​
fgiga [73]

Answer: 80 s

Explanation:

Speed is expressed in  v= d/t, derive the equation so we can have time.

First conert km into meters to cancel out both units and only seconds will remain.

1.2 km x 1000m/ 1km = 1200 m

t = 1200 m /15 m/s = 80 s

8 0
3 years ago
Calculate the resulting speed of an airplane with an airspeed of 120 km/h pointing due north when it encounters a wind of 90 km/
STatiana [176]

Answer:

The resulting speed of the airplane is 150 Km/h

Explanation:

The airspeed of the plane is 120 Km/h due North. The wind came from West pointing to the East at 90 Km/h

Both speeds are acting in different directions, so they must be added as vectors. Both vectors and the resulting velocity (Vr) are shown in the image below

The magnitude of that velocity can be computed by using Pythagoras's theorem:

Vr^2=120^2+90^2

Vr^2=14400+8100=22500

Vr=\sqrt{22500}=150

The resulting speed of the airplane is 150 Km/h

8 0
3 years ago
A skater is using very low friction rollerblades. A friend throws a Frisbee at her, on the straight line along which she is coas
tino4ka555 [31]

Question:

(a) She catches the Frisbee and holds it.  

Answer:

The correct option is;

A perfectly inelastic collision

Explanation:

A perfectly inelastic collision is one in which there is maximum amount of loss of kinetic energy in the system. In a perfectly inelastic collision, the colliding members lose their initial speed and they stick together resulting in a loss of kinetic energy.

Since she catches and holds on to the Frisbee, the kinetic energy of the Frisbee is lost as she holds on to it so as to combine her mass to that of the Frisbee.

8 0
3 years ago
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