A 430 g football is lying on the ground, then is kicked and is moving at 25 m/s. If the duration of the impact was 0.0010 s, what was the average force on the ball?

Answers

Answer 1

Answer: Tools used for this solution:
Impulse = change in momentum
Impulse = (force ) x (time applied)
Momentum = (mass) x (speed)
=================================
Momentum of the ball after the kick = (mass)x(speed) = 0.43kg x 25 m/s = 10.75 kg-m/s .

Impulse exerted by the kicker's toe = 10.75 kg-m/s .

(force) x (time) = 10.75 kg-m/s .

Force x 0.001 sec = 10.75 kg-m/s .

Divide each side by 0.001 sec :

Force = (10.75 kg-m/sec) / (0.001 sec) = 10,750 kg-m/s² = 10,750 newtons.

That's about 2,416 pounds from the kicker's toe, during that ¹/₁₀₀₀ of a second.

(1.21 tons !)

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Technological advances in transportation have come about in response to the depletion of fossil fuels and other negative aspects of the internal combustion engine. There are many positives to these advancements, but there are also some negatives. Which statement is a negative aspect of these advancements?A) These advancements use renewable resources like corn.
B) These advancements do not contribute to the greenhouse effect.
Eliminate
C) These advancements use cleaner fuels thereby reducing pollution.
D) These advancements are very expensive and not available to everyone.

Answers

Technical advancements in transportation are very expensive and not available to everyone.

What is technical advancements in transportation?

A revolution is currently taking place in transportation technology. While new ideas are ready to completely transform how we move, new technologies are increasing the effectiveness of existing transportation techniques.

The newest transportation revolution has seen a growth in different technologies.

The Internet of Things: The Internet of Things is predicated on the idea that all objects and people can be networked together. Route planning, accident prevention, and safety can be easily taken care by using internet.
Autonomous Cars: Autonomous vehicle technology is expected to advance and eventually replace human drivers as a safer option that also has additional economic and environmental advantages.
Lightweight Vehicle Materials: Moving away from cast iron and steel is the main goal of research into lightweight materials. The most likely replacements for these metals in the near future are carbon fiber construction and magnesium-aluminum alloys.

Although these modern technologies are established to be environmental friendly, These advancements are very expensive and not available to everyone. This is one among the disadvantages of technological advances in transportation.

Learn more about transports here:

brainly.com/question/2245726

#SPJ6

Answer:

Option D

Explanation:

These advancements are very expensive and not available to everyone. The others are positive aspects of these advancements in transportation.

What is the average speed in m/s for a car that travels 28 km in exactly 12 min?

Answers

Answer:

approximately 38.89 m/s.

Explanation:

To calculate the average speed, you can use the formula:

Average Speed = Distance / Time

Given:

Distance = 28 km

Time = 12 minutes = 12/60 hours = 0.2 hours

Now, plug in the values:

Average Speed = 28 km / 0.2 hours = 140 km/h

To convert the average speed from km/h to m/s, you can use the conversion factor: 1 km = 1000 m and 1 hour = 3600 seconds.

Average Speed = (140 km/h) * (1000 m/km) / (3600 s/h) ≈ 38.89 m/s

Heat is a transfer of thermal energy from one object to anther because of a difference in?

Answers

Because of a difference in temperature.

temperature is the answer

Plz I need the answer quick!!!
What is the definition of law of conservation of energy

Answers

Answer:

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside. This is particularly confusing in the case of non-conservative forces, where energy is converted from mechanical energy into thermal energy, but the overall energy does remain the same. The only way to use energy is to transform energy from one form to another.

Explanation:

Hope this helps!

Answer:

means that energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another.

Explanation: this is a shorter answer.

The force of gravity acting on a child's mass on earth is 490 newtons. Whats the child's mass?A. 206 kg
B. 800 kg
C. 50 kg
D. 4802 kg

Answers

Force of gravity on an object is the weight of the object and is given by mass times accerelation due to gravity. The accerelation due to gravity is the accerelation of an object in free fall and is given by 9.8m/s^2. Given that the force of gravity acting on a child's mass on earth is 490 newtns, i.e. F = mg which means that 490 newtons = 9.8 times mass. Therefore, mass of the child is 490 / 9.8 = 50 kg.

Answer:

C. 50 kg

Explanation:

Force of gravity on an object is the weight of the object and is given by mass times acceleration due to gravity. The acceleration due to gravity is the acceleration of an object in free fall and is given by 9.8m/s^2. Given that the force of gravity acting on a child's mass on earth is 490 newtons, i.e. F = mg which means that 490 newtons = 9.8 times mass. Therefore, mass of the child is 490 / 9.8 = 50 kg.

Earth's gravity acts upon objects with a steady force of __________.a. 8.9 meters per second
b. 9.8 meters per minute
c. 8.9 meters per minute squared
d. 9.8 meters per second squared

Answers

None of the choices is a force. 'a' and 'b' are speeds. 'C' and 'd' are accelerations. ... The steady force of gravity is 9.8 newtons PER KILOGRAM of mass. ... The question is written by someonewho very much wants to discourage anyone interested in Physics.

Answer:

9.8 meters per second squared

Explanation:

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