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Luba_88 [7]
3 years ago
6

A moving object is in equilibrium. Which best describes the motion of the object if no forces change?

Physics
2 answers:
Alchen [17]3 years ago
8 0
If the object is in equilibrium that means that the sum of the forces on it is zero and the net force is zero. If none of the forces changes then the object continues in constant uniform motion. That means constant speed in a straight line.
katrin2010 [14]3 years ago
5 0

Answer:

Uniform speed linear motion .

Explanation:

Any object can be in the state of equilibrium is sum of all the forces acting on it is zero means zero net force. If no forces change over it then the object will be uniform motion which means speed will remain constant. Best example for this situation is uniform motion along a straight line or uniform speed linear motion.

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A 200g(m2) mass is pulling the cart (m1) across the table as shown below. If it covers 1.12m in 4.8 seconds starting from rest,
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Answer: 20.21 kg

Explanation:

The mass hanging from the pulley is pulling the cart. The force by which cart is being pulled is equal to weight of the hanging mass.

F=m_2g

⇒F=0.200 kg ×9.8 m/s²=1.96 N

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The Cart covers 1.12 m distance in 4.8 s.

From the equation of motion,

s = u t + 0.5 × a t²

We will find the acceleration of the cart,

Distance covered, s = 1.12 m

Initial velocity, u = 0 ( staring from rest)

Time taken, t = 4.8 s

⇒1.12 m = 0 + 0.5 × a × (4.8 s)²

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Now the force which causes this acceleration is:

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where m is the mass of the cart and a is the acceleration of the cart

⇒1.96 N = m×0.097 m/s²

⇒m = 20.21 kg

Hence, the mass of the cart is 20.21 kg.


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