Will it take longer for a train or a car traveling at 100 mi/hr to stop
Answers
Answer;
A train will take longer time to stop compared to a car.
Explanation;
- For a body in motion to stop a braking force at a given distance is required for the body to loose kinetic energy.
- The the stopping distance of a car depends on the breaking force and the the mass of the moving body. The stopping distance will depend on the kinetic energy and the breaking force acting to stop the motion of a body.
- The mass of a moving body determines its kinetic energy, and also determines the resultant force according to the newton seconds law of motion . Therefore, mass determines the breaking force and the stopping distance, such that a big body in motion will require more force to stop and will take a longer stopping distance and time.
Related Questions
Which process in the water cycle do plants perform
Convert 16.1 km/h to meters per second
The quantum mechanical model of the atom ____. a. defines the exact path of an electron around the nucleus b. was proposed by Niels Bohr c. involves finding an electron somewhere in a specific orbital d. has many analogies in the visible world
The device which disconnects the start winding in some split-phase motor circuits after a preset speed is obtained is thea. thermostat. b. commutator. c. brush spring. d. relay.
Answers
Answer:
a) 1 in. = 2.54 cm
Explanation:
Final answer:
The correct statement is a) 1 in. = 2.54 cm. To convert inches to centimeters, multiply the number of inches by the conversion factor 2.54 cm/1 in.
Explanation:
The correct statement is a) 1 in. = 2.54 cm.
To convert inches to centimeters, you can multiply the number of inches by the conversion factor 2.54 cm/1 in. For example, if you want to convert 7 inches to centimeters, you would multiply 7 in. by 2.54 cm/1 in. This gives you 17.78 cm, which is approximately equal to 17.68 cm (as stated in option b).
Option c) 1 ft = 12 in. and option d) 74 in. = 1 yd are also correct statements, but they are not directly related to the conversion between inches and centimeters.
Learn more about Conversion between inches and centimeters here:
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Answers
The hardest known natural material is diamond!!! Good luck :)
Answers
The static friction force is a force that prevents motion of an object kept on a surface, due to the interaction of the surface of the object and the surface on which it is kept
- The minimum force required to start the block moving is 14 N
Reason:
The known parameter are;
The weight of the block, W = 35 N
The static friction of the surface of the table surface, = 0.40
Required:
To find the minimum force to start the block moving
Solution:
The force required to start the block moving is given by the frictional force that needs to be surpassed
Force required, F = Force of friction
Force of friction = Normal reaction × Coefficient of static friction
On a flat surface, the normal reaction = The weight of the object
∴ Force of friction, = Weight of the object × Coefficient of static friction
Which gives;
Force required, F = Force of friction, = 14 N
The minimum force required to start the block moving, F = 14 N
Learn more about the static friction force here:
Answer: 14
Explanation:
Force(normal)*coefficient
boiling momentarily when the lid is removed
Answers
Answer:
It's because it tips over the threshold from nucleate boiling, which we can see, to convection boiling, which we can't. ... Even if the steam stayed in the pot, it would still stop boiling when you removed the heat. The steam and water in a liquid/vapour mixture are at the same temperature (100ºC).
Explanation:
b. If you have an accompanying licensed driver
c. If you drive on less traveled roads
d. If you get permission from the local police
Answers
Final answer:
When a driver's license is suspended, typically, one cannot drive. However, one might be able to drive under certain conditions, like obtaining an essential need driver license or a hardship license. Laws vary by location, hence local transportation operating rules must be consulted.
Explanation:
When your driver's license is suspended, under most jurisdictions you are generally not allowed to drive. However, there can be certain exceptions to this rule. The correct answer among the provided options would be (a) If you obtain an essential need driver license. This type of license, also referred to as a hardship or restricted license, may allow you to drive under certain conditions, for instance, for work or medical appointments. It's important to note that laws may vary by location, so it is always important to consult with local legal sources or transportation departments to understand specific regulations and processes related to obtaining conditional driving permissions when your license is suspended.
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Answers
Well, you see, I don't think Alana really is the reference frame.
Call me paranoid, but I think you changed the reference frame
during the question, and didn't tell us.
In which reference frame is the 19 km/hr measured ?
It CAN'T be Alana's reference frame. Your own reference
frame moves along with you, and you can't move in it, even
if your name is Alana.
If Alana is the reference frame, and she throws the tennis ball
at 11 km/hr, then the speed of the ball is 11 km/hr in Alana's
reference frame. Her reference frame moves with her, so
it makes no difference how fast she is skateboarding in any
other reference frame, who she throws the ball at, or whether
or not he sees it coming and catches it.
Yes, this stuff can get confusing. And if you think it's bad now,
wait till you start reading some of Prof. Einstein's stuff, where
two people in the same reference frame can watch the same
tennis ball, and not even agree on how fast it's moving, because
THEY're both moving and their own motion makes their rulers
and clocks change ! So they measure different speeds, and
they're both right !
But I got distracted. I'm sorry. The point I'm trying to make,
right now when you're just starting to learn reference frames,
is that EVERY time you say a speed, you have to tell which
reference frame the speed is in. Because, as you're starting
to learn, the same object can have a different speed in every
reference frame.
And, just in case you're thinking about this later today
and you want to ask "Which one is the REAL speed ?" . . .
THAT's the whole point of learning about reference frames !
There is NO SUCH THING as REAL speed. It ALWAYS
depends on which reference frame it's measured in. They're
all different, they're all real, and they're all correct.
The first thing we must do for this case is to define a frame of reference.
We know that, the frame of reference for this case is Alana.
Therefore, the tennis ball has a speed relative to Alana.
The speed relative to Alana, is the same speed with which Alana throws the tennis ball.
Therefore, the speed of the tennis ball is:
v = 11 Km/h
Answer:
The speed of the tennis ball is:
v = 11 Km/h