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Ronch [10]
3 years ago
9

A passenger railroad car has a total of 8 wheels. Springs on each wheel compress--slightly--when the car is loaded. Ratings for

the car give stiffness per wheel (the spring constant, treating the entire spring assembly as a single spring) as 2.8×10^7N/m. When 30 passengers, each with average mass of 80 kg, board the car, how much does the car move down on its spring suspension?
Physics
1 answer:
deff fn [24]3 years ago
5 0

Answer:

Explanation:

mg = kx

x = mg/k

x = 30(80)(9.8)/2.8e7 = 0.00084 m  ≈ 1 mm

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Simple machines are in a mousetrap
sergeinik [125]

Answer:

A mousetrap makes use of a simple machine called a lever.

Explanation:

In a second-class lever the effort force is at the other end, with the load in the middle. In a third-class lever, the load is at the end and the effort force is between the fulcrum and the load. When you set the mousetrap, you are using a second-class lever. Sorry if I get this wrong. I am in 5th grade! ♥

7 0
3 years ago
Objects 1 and 2 attract each other with a gravitational force of 12 units. If the mass of Object 2 is tripled, then the new grav
olasank [31]

Explanation:

Fgravity = G*(mass1*mass2)/D².

G is the gravitational constant, which has the same value throughout our universe.

D is the distance between the objects.

so, if you triple one of the masses, what does that do to our equation ?

Fgravitynew = G*(3*mass1*mass2)/D²

due to the commutative property of multiplication

Fgravitynew = 3* G*(mass1*mass2)/D² = 3* Fgravity

so, the right answer is 3×12 = 36 units.

5 0
2 years ago
Which type of change releases a large amount of energy per gram of material as a result of the conversion of matter into energy?
kramer
B.) "Nuclear Change" <span> releases a large amount of energy per gram of material as a result of the conversion of matter into energy

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6 0
4 years ago
Read 2 more answers
Can someone answer this 2 correctly please
ahrayia [7]

Answer:

I know the first one is C.) 4J. I don't know of the answer for the second oneis suppose to be in N/m form? but I got

2,500N/m

5 0
3 years ago
There is an old physics joke involving cows, and you will need to use its punchline to solve this problem
aleksandr82 [10.1K]

Answer:

The angle of deflection will be "1.07 × 10⁻⁷°".

Explanation:

The given values are:

Mass of a cow,

m = 1100 kg

Mass of bob,

mb = 1 kg

The total distance between a cow and bob will be,

d = 2 m

Let,

The tension be "t".

The angle with the verticles be "\theta".

Now,

Vertically equating forces

⇒  T\times Cos \theta =mb\times g ...(equation 1)

Horizontally equating forces

⇒  T\times Sin \theta = G\times M\times \frac{mb}{d^2} ...(equation 2)

From equation 1 and equation 2, we get

⇒  tan \thata=\frac{G\times M}{g\times d^2}

O putting the estimated values, will be

⇒  \theta = tan(\frac{6.674\times 10^{-11}\times 1100}{9.8\times 2^2} )

⇒  \theta = 1.07\times 10^{-7}^{\circ}

6 0
4 years ago
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