Please help me with this. Finding speed.
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What you need is a definition of average speed. Here it is:
Average speed = (distance covered) / (time to cover the distance) .
For the race car in the question:
Average speed = (200 mile) / (2.5 hour)
= (200 / 2.5) (mile/hour)
= 80 miles per hour .
That doesn't seem all that fast for a race-car.
But the math is bullet-proof.
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Answer:
Explanation:he ball bounces back up with nearly the same speed as it hit. i don,t know if is right
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Answer: agree
Explanation: because there is always a force that causes motion..
Also I’m back
Where’s the old gang?
Final answer:
Newton's first law of motion states that an object in motion will continue to move at a constant speed in a straight line unless acted upon by an external force. So, not all objects in motion require a force to keep them in motion.
Explanation:
According to Newton's first law of motion, an object in motion will continue to move at a constant speed in a straight line unless acted upon by an external force. So, it is not true that any object in motion must experience a force to keep it in motion. The force is only necessary to change the object's state of motion, such as slowing it down or altering its direction.
For example, imagine a hockey puck sliding on a frictionless ice rink. Once given an initial push, the puck will continue moving at a constant speed in a straight line until it encounters an external force, such as contact with the boards or another player.
Therefore, I disagree with the student's claim. An object in motion does not necessarily need a force to keep it in motion, but rather a force is required to change its state of motion.
Learn more about Newton's First Law of Motion
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hope it helped
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Answer:
The number of valence electrons increases to 8 or, the atom gives up loosely held valence electrons.
Explanation:
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In a series circuit, there is only one possible path from one battery
terminal, through the circuit, to the other battery terminal. All of the
current that leaves one side of the battery travels exactly the same
path to the other side of the battery. There's never any point in the
circuit where the current has a choice of which way to go.
In a parallel circuit, there are different possible paths. On its way
through the circuit, the current comes to a point where it has a
choice of going this way or that way. What happens at that point
is that the current splits up ... part of it goes this way, and the rest
of it goes that way, and it all joins up together again somewhere
else in the circuit.