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3 years ago

What information is represented by the slope of a graph of displacement versus time (displacement-time graph)?

Physics

1 answer:

OverLord2011 [107]3 years ago

7 0

C - velocity

When you look at a point it is saying it goes this many meters in this amount of time. This is speed which means the slope is velocity

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A boy carries a 50 N box up a flight of stairs 10-m high. How much potential energy has the box gained?

almond37 [142]

Answer:

Potential energy, P = 500 J

Explanation:

We have,

Weight of the box, W = 50 N

Height of the stairs, h = 10 m

It is required to find the potential energy gained by the box. The potential energy is possessed by an object due to its height. The formula of potential energy is given by :

$P=mgh$

g is acceleration due to gravity

$P=50\ N\times 10\ m\\\\P=500\ J$

So, the potential energy of 500 J is gained by the box.

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vodomira [7]

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Explanation:

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3 years ago

A 250-kN railroad car A is traveling at 40 m/s while a 550-kN freight car B is traveling at 10 m/s (both cars heading to the rig

Damm [24]

Answer:

the maximum deformation undergone by the spring = 47.46 cm

Explanation:

Using conservation of momentum:

$m_Av_A + m_Bv_B = (m_A+m_B )v$

where:

$m_A = \frac{250\ kN}{g}$

$v_A = 40$

$m_B = \frac{550\ kN}{g}$

$v_B =10$

Then;

$m_Av_A + m_Bv_B = (m_A+m_B )v$

$\frac{250*10^3}{9.81}*40 + \frac{550*10^3}{9.81}*10 = (\frac{800*10^3}{9.81} )v$

$1580020.387 = 81549.43935 \ v$

$v = \frac{1580020.387}{81549.43935}$

v = 19.375 m/s

However ; using conservation of energy to determine the maximum deformation undergone by the spring ; we have:

$\frac{1}{2} [m_Av_A^2 +m_Bv_B^2] =\frac{1}{2}[(m_A+m_B)v^2 + kx^2]$

$[m_Av_A^2 +m_Bv_B^2] =[(m_A+m_B)v^2 + kx^2]$

$[\frac{250*10^3}{9.81}*40^2 + \frac{550*10^3}{9.81}*10^2] =[ (\frac{800*10^3}{9.81} )*19.375^2 + 70 *10^6 \ * x^2]$

x = 0.4746 m

x = 47.46 cm

Thus, the maximum deformation undergone by the spring = 47.46 cm

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4 years ago

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What information is represented by the slope of a graph of displacement versus time (displacement-time graph)?​

What information is represented by the slope of a graph of displacement versus time (displacement-time graph)?