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Mumz [18]
3 years ago
7

A toy train moves 40m in 20s at the constant velocity. What is the toy’s velocity? * 1 point

Physics
1 answer:
stepladder [879]3 years ago
7 0

Answer:

2 m/s

Explanation:

Velocity is a vector quantity that is given by:

v=\frac{d}{y}

where

d is the displacement of the object (a vector indicating its change in position)

t is the time elapsed

Note that since velocity is a vector, it has both a magnitude and a direction (the same as the displacement).

For the toy train in this problem, we have:

d = 40 m (displacement)

t = 20 s (time elapsed)

So, its velocity is:

v=\frac{40}{20}=2 m/s

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Answer:

1cm=10mm

10cm/0.125mm

80pages

5 0
3 years ago
A current of 5 A is flowing in a 20 mH inductor. The energy stored in the magnetic field of this inductor is:_______
Kipish [7]

Answer:

C. 0.25J

Explanation:

Energy stored in the magnetic field of the inductor is expressed as E = 1/2LI² where;

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Given parameters

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I = 5A

Required

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E = 1/2 × 20×10^-3 × 5²

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7 0
3 years ago
Two blocks of masses m and 3m are placed on a frictionless, horizontal surface. A light spring is attached to the more massive b
ivanzaharov [21]

Answer:

Explanation:

a ) Conservation of momentum is followed

m₁ v₁  = m₂ v₂

3m x 2 = m  v

v = 6 m/s

Total kinetic energy

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= 8.4 J

This energy must be stored as elastic energy in the spring which was released as kinetic energy on burning the cord.

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4 0
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How would the magnetic field lines appear for a bar magnet cut at the midpoint, with the two pieces placed end to end with a spa
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Answer:

cutting the magnet in two parts each part has a North and South pole,

Explanation:

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4 0
3 years ago
What energy comes from swinging a bat
hjlf

Answer:

Kinetic Energy

Explanation:

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8 0
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