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Natali [406]
4 years ago
8

Matthew drops a ball and watches it bounce back up from the ground he draws a force diagram that shows the forces when the ball

collides with the grand Which diagram correctly shows the forces involved
​

Physics
2 answers:
dalvyx [7]4 years ago
4 0

Answer: i think that the third option is correct

the force of the ball goes to the floor making it go down and up reflecting a little lower force back to the ball and sending the ball back up

hope this helps

brainliest if possible

alukav5142 [94]4 years ago
4 0

Answer:

Option (c)

Explanation:

In this question it is given that, Matthew drops a ball and watches it bounce back up from the ground. The force diagram is given which shows when the ball collides with the ground.

The force acting on the ball are gravitational force and drag force. According to Newton's third law of motion, the force acting on the ball are equal in magnitude but the direction is opposite.

So, diagram (c) shows the correct scenario as per third law of motion. Hence, the correct option is (c).

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The index of refraction for water is about 4 3 . What happens as a beam of light travels from air into water?
hjlf

Answer:

Its speed decreases.

Explanation:

When light enters into water, its speed decreases (as well as its frequency). This is the reason why refraction (the bending of light when it changes media) occurs.

This can be proven mathematically.

Given that the refractive index of water is 4/3, we know that refractive index is the ratio of the speed of light in a vacuum to the speed of light in another medium.

Therefore,

4/3 = (speed of light in vacuum) / (speed of light in water)

Speed of light in a vacuum is 3 * 10^8. Hence,

Speed of light in water is:

v = (3 * 10^8) / (4/3)

v = 2.25 * 10^8 m/s

As we can see, the speed of light decreases in water.

5 0
3 years ago
Spring constant here for 22 cm spring is 50 N per metre 840 if you stretch the spring and when is measured again is 32 cm long w
seraphim [82]
K= fx => f = k/x => 50N/100cm / 10 cm = 5/10= 0.5 N
3 0
3 years ago
A container of hydrogen gas has a volume of 2.3m³. What is the mass of hydrogen contained? The density of hydrogen = 90kg/m³.
umka2103 [35]

Answer:

container of hydrogen gas has a volume of 2.3m³. What is the mass of hydrogen

8 0
3 years ago
g A bowling ball with a mass of 3.86 kg and a radius of 0.161 m starts from rest at a height of 2.5 m and rolls down a 48.4 o sl
Fynjy0 [20]

Answer:

v=1.5m/s

Explanation:

The gravitational potential energy gets transformed into translational and rotational kinetic energy, so we can write mgh=\frac{mv^2}{2}+\frac{I\omega^2}{2}. Since v=r\omega (the ball rolls without slipping) and for a solid sphere I=\frac{2mr^2}{5}, we have:

mgh=\frac{mv^2}{2}+\frac{2mr^2\omega^2}{2*5}=\frac{mv^2}{2}+\frac{mv^2}{5}=\frac{7mv^2}{10}

So our translational speed will be:

v=\sqrt{\frac{10gh}{7}}=\sqrt{\frac{10(9.8m/s^2)(0.161m)}{7}}=1.5m/s

6 0
3 years ago
An aluminum rod is 300m and at 25 degree Celsius. Calculate the change in rod
Schach [20]

Answer:

Explanation:

540

6 0
3 years ago
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