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melisa1 [442]
3 years ago
13

John attached a ball to a spring

Physics
1 answer:
chubhunter [2.5K]3 years ago
8 0

Answer:

C down

Explanation:

The ball is pulling the spring down so this must be the direction of the force

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Which of these would represent the force of gravity
tigry1 [53]

Missing figure: find it in attachment.

Answer:

Force D

Explanation:

In order to answer the question, let's keep in mind that the force of gravity on an object on Earth is the attractive force exerted by the Earth on the object; its direction is always downward (towards the Earth's centre), and its magnitude is given by

F = mg

where m is the mass of the object and g is the acceleration of gravity.

It follows immediately that in the figure, the force of gravity is the only force acting downward: therefore, force D.

The other forces are called:

Force A: thrust (it is the forward force generated by the engines)

Force B: lift (it is the upward produced by the aerodynamics of the wings)

Force C: air resistance (it is the backward force due to the friction between the air and the surface of the plane)

7 0
3 years ago
What is the main difference between macroscopic kinetic energy in a motion and microscopic kinetic energy of individual molecule
labwork [276]

Answer:

Explained

Explanation:

1.The macroscopic form of kinetic energy is organized whereas the microscopic kinetic energy disorganized form of energy.

2.Observing macroscopic kinetic energy is easier than the microscopic energy.

3. All macroscopic kinetic energy can be converted to useful work whereas microscopic kinetic energy can not be.

4. Macroscopic kinetic energy is possessed  by moving objects whereas microscopic objects possessed by the virtue of motion, rotation, vibrations of atoms in substance.

Wind energy is macroscopic energy as it can be harnessed to produce electricity and perform some useful work. And discussed above useful work can only be performed using macroscopic kinetic energy.

8 0
3 years ago
What happens to the size of atoms as we go from left to right on the periodic table? T
Lady_Fox [76]

Answer:

Atomic size gradually decreases from left to right across a period of elements.

Explanation:

This is because, within a period or family of elements, all electrons are added to the same shell. However, at the same time, protons are being added to the nucleus, making it more positively charged.

8 0
3 years ago
When the temperature of air rises, the amount of water needed for saturation
Oliga [24]
It Increases. I just took a quiz with the same question.
7 0
4 years ago
Read 2 more answers
Which of the following is derived unit?
Taya2010 [7]

Answer:

D: m² (square meters, area)

Explanation:

Derived units are a combination of SI base units.  m² is the only option that's a combination of base units (meters times meters).

6 0
4 years ago
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