Answer:
at the top
Explanation:
Potential energy is the stored energy, mechanical energy,
or energy possessed by by virtue of the position of an object.an example of potential energy is the energy that a ball possesses by virtue of its sitting at the top of the stairs it being about to roll down the stairs.
Answer:
<h2>
187,500N/m</h2>
Explanation:
From the question, the kinectic energy of the train will be equal to the energy stored in the spring.
Kinetic energy = 1/2 mv² and energy stored in a spring E = 1/2 ke².
Equating both we will have;
1/2 mv² = 1/2ke²
mv² = ke²
m is the mass of the train
v is the velocity of then train
k is the spring constant
e is the extension caused by the spring.
Given m = 30000kg, v = 4 m/s, e = 4 - 2.4 = 1.6m
Substituting this values into the formula will give;
30000*4² = k*1.6²
The value of the spring constant is 187,500N/m
To solve this problem we will apply the concepts related to the Impulse which can be defined as the product between mass and the total change in velocity. That is to say
Here,
m = mass
Change in velocity
As we can see there are two types of velocity at the moment the object makes the impact,
the first would be the initial velocity perpendicular to the wall and the final velocity perpendicular to the wall.
That is to say,
El angulo dado es de 45° y la velocidad de 25, por tanto
The change of sign indicates a change in the direction of the object.
Therefore the impulse would be as
The negative sign indicates that the pulse is in the opposite direction of the initial velocity.
Answer:
Explanation:
The Saffir-Simpson Hurricane Wind Scale gives 1 to 5 rating based on a hurricane's wind speed, storm surge and potential property damage. It rates according to categories. When placed at Hurricanes of Category 3 and above, they are termed major catastrophic hurricanes because of their potential for loss of life and damages of property. Ratings at Category 1 and 2 storms are dangerous but can be prevented by following directed measures.
Florida situated directly in the hurricane at east coast , had experiened Category 1- Category 5 ratings from hurricane and noticed in Land fall in Florida since 1894 with Winds ranging from 74-95 mph with some dangerous damages which can lead damages to Well-built homes, dedtroying roofs , Uprooting shallow rooted trees, and causing power outages due to destruction of poles
to 157 mph or higher causing Catastrophic damages making the area inhabitable due to loss of life and properties.
For example, Hurricane Dorian in September 2019 attacked Florida’s east coast resulting to a Category 2 storm producing tropical storm force winds,heavy rain and storm surge leading to damages of roof of building and disruption of power poles.
Answer:
145.43 N
Explanation:
Weight is given by (mg)
where m = mass of the body
g = acceleration due to gravity
mass is constant everywhere and is equal to 77.1 kg, both on the earth and on the moon.
But the acceleration due to gravity exerted by the moon near the moon's surface is 16.6% that of Earth,
g(moon) = 0.166 g(earth) = 0.166 × 9.8 = 1.6268 m/s²
Weight on the moon = mg(moon) = (77.1×1.6268) = 125.43 N
