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12345 [234]
3 years ago
8

You are riding a bicycle. If you apply a forward force of 125 N, and you and

Physics
1 answer:
erica [24]3 years ago
8 0

Answer:

1.52g

Explanation:

Given parameters:

Force  = 125N

Mass combined  = 82kg

Unknown:

Acceleration of the bicycle  = ?

Solution:

From Newton second law of motion suggests that:

   Force = mass x acceleration

  Acceleration = \frac{force}{mass}  = \frac{125}{82}   = 1.52g

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A car of mass 998 kilograms moving in the positive y–axis at a speed of
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A train moves with a constant velocity for 15s for 155m. How fast is the train moving?
bonufazy [111]

Answer: 10.3m/s

Explanation:

In theory and for a constant velocity the physics expression states that:

Eq(1):  distance  = velocity times time <=> d = v*t    for v=constant.

If we solve Eq (1) for the velocity (v) we obtain:

Eq(2):  velocity  = distance divided by time <=> v = d/t

Substituting the known values for t=15s and d=155m we get:

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5 0
3 years ago
Longitudinal waves do not have
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3 years ago
The engine of a locomotive exerts a constant force of 6.8 105 N to accelerate a train to 80 km/h. Determine the time (in min) ta
Setler [38]

Answer:

t = 6 minutes

Explanation:

Given that,

Force,F=6.8\times 10^5\ N

Initial speed of the train, u = 0

Final speed of the train, v = 80 km/h = 22.22 m/s

The mass of the train, m=1.1\times 10^7\ kg

We need to find the time taken by the train to come to rest. We know that,

F = ma

F=\dfrac{m(v-u)}{t}\\\\t=\dfrac{m(v-u)}{F}\\\\t=\dfrac{1.1\times10^7\times (22.22-0)}{6.8\times 10^5}\\\\t=359.44\ s

or

t = 6 minutes (approx)

So, the required time is equal to 6 minutes.

3 0
2 years ago
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