moving the balls closer together
pumping more air into the soccer ball
putting the baseball in a plastic case
Explanation:
The gravitational force between the baseball and the soccer ball will increase if the moving balls are closer together, pumping more air into the soccer ball and putting the baseball in a plastic case.
According to Newton's law of universal gravitation "the force between two masses is proportional to the magnitude of their mass and inversely proportional the square of the distances between them". It is mathematically expressed as:
Fgravity = G
Where G is a constant called the universal gravitation constant.
M1 is the mass of particle 1
M2 is the mass of particle 2
r is the distance between them.
The force of gravity increases as their masses increase and also as the distance between the bodies reduce.
From the options:
Moving the balls closer together distance reducing
Pumping more air into the soccer ball mass increasing
Putting the baseball in a plastic case mass increasing
Learn more:
Universal Gravitation brainly.com/question/1724648
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The answer is
D. in a straightforward, objective manner
According to the question, the object is placed at 2F
The ray diagram is shown in the figure attached.
According to the figure:
Object AB is at 2F₁
First, we draw a ray parallel to principal axis.
So, it passes through focus after refraction.
We draw another ray which passes through optical center.
So, the ray will go through without any deviation.
Where both refracted rays meet is point A' and the image formed is A'B'
This image is formed at 2F₂
We can say that:
- Image is real.
- Image is inverted.
- Image is exactly the same size as the object.
Answer:
Parachute exerts a force of 619.2 N upward
The net force is 86.4 N acting downward
Explanation:
As the gravitational acceleration g = 9.8 m/s2, the parachute help reduces the net acceleration to 1.2m/s. So it must exerted an upward acceleration on the skydiver of
9.8 - 1.2 = 8.6 m/s2
Since the skydiver mass is 72 kg, we can use Newton's 2nd law to calculate the force that causes this acceleration of 8.6
F = ma = 8.6*72 = 619.2 N acting upward
The net force is also the product of net acceleration and mass
= 1.2 * 72 = 86.4 N acting downward
You would multiply the speed by the time. So the answer would be 840 miles.
