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Vikentia [17]
2 years ago
13

A 20,000 kg railroad car is traveling at 5 m/s when it collides and couples with a second, identical car at rest. What is the re

sulting speed of the combined cars?
Physics
1 answer:
PilotLPTM [1.2K]2 years ago
7 0
Ok I don’t know the answer I’m in 5th grade but 2431 is wrong
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1. How is electric potential energy similar to gravitational potential energy? How is it different? Where will an electron bound
Korolek [52]
Both ve similar equations 
<span>both are energies of one object w.r.t another </span>
<span>differences- electric pe is due to electrostatic force and gravitational pe is due to gravitational force </span>
<span>electric pe is > than gravitational pe since electrostatic force> gravitational force </span>
<span>electron bound in an atom ll ve largest potential enegy in its ground state. i think hope it helps</span>
7 0
2 years ago
An athlete whose mass is 97.0 kg kg is performing weight-lifting exercises. Starting from the rest position, he lifts, with cons
SIZIF [17.4K]

Answer:

470 N.

Explanation:

Using equations of motion:

S = vi*t + 1/2*(a*(t^2))

Given:

S = 0.65 m

t = 1.5 s

vi = 0 m/s

0.65 = 1/2 * (a * (1.5)^2)

a = 1.3/2.25

= 0.578 m/s^2

Force = mass * acceleration due to gravity

= 92 * 0.578

= 53.16 N

Total force = 420 + 53.16

= 473.16 N

= 470 N.

6 0
3 years ago
A girl with a mass of 22 kg is playing on a swing. There are three main forces acting on her at any time: gravity, force due to
Mrac [35]

Answer:

A is the answer I think pls check it

7 0
3 years ago
Displacement vectors of 10 m west and 14 m west make a resultant vector that is _____.
Anastaziya [24]

For this case we can write each one of the vectors in the following way:

v1 = 10 i\\v2 = 14 i

This means that the x-axis is defined as positive towards the west.

Then, the resulting vector is:

v1 + v2 = 10i + 14i\\v1 + v2 = 24 i

Answer:

Displacement vectors of 10 m west and 14 m west make a resultant vector that is 24 m west

6 0
2 years ago
Read 2 more answers
A wave on a string is described by Y(x, t) : 15.0 sin( nclS - 4rrt),, where x and y are in centimeters and / is in seconds. (a)
KIM [24]

Answer:

dsf

Explanation:

fsdfs

4 0
3 years ago
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