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Nitella [24]
4 years ago
12

A 70 kg driver gets into an empty taptap to start the day's work. The springs compress 2.3×10−2 m . What is the effective spring

constant of the spring system in the taptap?
Physics
1 answer:
ANEK [815]4 years ago
5 0

Answer:

29856.521 N/m

Explanation:

m=Mass\ of\ diver=70\ kg\\x=Length\ compressed\ by\ spring=2.3\times 10^{-2}\ m\\a=Acceleration\ due\ to\ gravity=9.81\ m/s^2\\F=Force\ exerted\ by\ diver=m\times a\\\Rightarrow F=70\times 9.81\\\Rightarrow F=686.7\ N\\k=spring\ constant\\F=k\times x\\\Rightarrow k=\frac {F}{x}\\\Rightarrow k=\frac {686.7}{2.3\times 10^{-2}}\\\therefore k=29856.521\ N/m

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Number 3.

When you have two parallel wire and the charges are moving, they create a magnetic field around the wire (right-hand rule, thumb points in the direction of current).

If you want the math, here ya go:

\frac{F}{L} = \frac{4 \pi *10^{-7}II' }{2 \pi r}

F: magnetic force on the wire, L: length of the wire I: current in one wire I': current in other wire r: distance of the wire.

As we can see, two wires that has current through it will generate a force on each other.
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4 years ago
Two blocks are connected by a very light string passing over a massless and frictionless pulley. Traveling at constant speed, th
Semenov [28]

Answer:

<h2>i. 9J and </h2><h2>ii.  -9J</h2>

Explanation:

Please see attached the diagram and also the FBD for your reference.

Step one:

given data

Weight w1=20N

Distance s1=75cm= 0.75m

Weight w2=12N

Distance s2=75cm =0.75m

Clearly, we are asked to find the work done by gravity and the tension in the string.

we know that work is defined as force times the distance traveled

W=F*D

and to know the force we need the acceleration, seeing that the system is stationary the acceleration due to gravity 9.81m/s^2 is not needed here

i . Work done by gravity = w2*s2=12*0.75=9J

ii. The tension is equal but opposite = -9J

4 0
3 years ago
if the light completed the 71.0-km round trip in the time it took the mirror to complete one-eighth of a revolution, what is the
astraxan [27]
What light ?
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6 0
3 years ago
A man drags his suitcase for a 2.00m with a force of 10.0n. Determine the work done on the suitcase if, it is inclined at an ang
Lelu [443]

Answer:

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3 0
3 years ago
A car starts from rest and after 20 seconds it's velocity becomes 108km find the acceleration of the car
andre [41]

Answer:

1.5 km/s²

Explanation:

Given that:

a car starts from rest; it means the initial velocity (u) = 0 km/hr = 0 m/s

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The acceleration (a) of the car can be determined by using the formula:

a = \dfrac{v-u}{t}

a = \dfrac{30\  m/s -0 \ m/s}{20 \ s}

a = \dfrac{30 \  m/s}{20 \ s}

a = 1.5 km/s²

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