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antoniya [11.8K]
3 years ago
10

A caravan of mass 800kg is towed by a car with an acceleration of 2m/s^2 .If the resistance to motion is 100N,what is the force

exerted by the car ?
Physics
1 answer:
ASHA 777 [7]3 years ago
8 0

Answer: 1600 N

Explanation:

The force exerted by the car to move the 800 kg-caravan is:

F=m.a

Where a=2 m/s^{2} is the acceleration

F=(800 kg)(2 m/s^{2})

F=1600 N This is the force exerted by the car, which is greater than the resistance force F_{r}=100 N. That is why the caravan is moving.

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An archer pulls her bowstring back 0.400 m by exerting a force that increases uniformly from zero to 230 N. (a) What is the equi
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Answer: An archer pulls her bowstring back 0.400m by exerting a force that increases uniformly from zero to 230N. The equivalent spring constant of the bow will be 575N/m

Explanation: To find the answer, we have to know about the Simple Harmonic Motion.

<h3>What is Simple Harmonic Motion?</h3>
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<h3>How to approach the problem?</h3>
  • Given that, an archer pulls her bowstring back 0.400m by exerting a force that increasing from zero to 230N.
  • Here, from the question given, we can write, x=-0.400m and F=230N.
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An object attached to an ideal massless spring is pulled across a frictionless surface. If the spring constant is 45 N/m and the
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Answer:

The mass of the object is 49.5kg which is approximately 50kg

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Given that

Spring constant (k)=45N/m

The extension (e)=0.88m

Also given that the acceleration is 0.8m/s²

Force by the spring is given as

Using hooke's law

According to Hooke's law which states that the extension of an elastic material is directly proportional to the applied force provided that the elastic limit is not exceeded. Mathematically,

F = ke where

F is the applied force

k is the spring constant

e is the extension

From the formula k = F/e

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m is the mass of the block = ?

a is the acceleration = 0.8m/s²

e is the extension of the spring =  0.88m

k is the spring constant = 45N/m

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