Use the kinematic equation: Vf=Vi+at
Then plug;
Vi=14 m/s
a=5 m/s²
t=20 s. Therefore;
Vf=14+(5*20)
Vf=114 m/s.
Answer:
the speed of the tip of a blade 10 s after the fan is turned off is 16.889 m/s.
Explanation:
Given;
diameter of the ceiling fan, d = 90 cm = 0.9 m
angular speed of the fan, ω = 64 rpm
time taken for the fan to stop, t = 28 s
The distance traveled by the ceiling fan when it comes to a stop is calculated as;
![d = vt = \omega r\times t= ( \frac{64 \ rev}{\min} \times \frac{2 \pi \ rad}{rev} \times \frac{1 \min}{60 \ s} \times 0.9 \ m) \times 28 \ s\\\\d = 168.89 \ m](https://tex.z-dn.net/?f=d%20%3D%20vt%20%3D%20%5Comega%20r%5Ctimes%20%20t%3D%20%28%20%5Cfrac%7B64%20%5C%20rev%7D%7B%5Cmin%7D%20%5Ctimes%20%5Cfrac%7B2%20%5Cpi%20%5C%20rad%7D%7Brev%7D%20%5Ctimes%20%5Cfrac%7B1%20%5Cmin%7D%7B60%20%5C%20s%7D%20%5Ctimes%200.9%20%5C%20m%29%20%5Ctimes%2028%20%5C%20s%5C%5C%5C%5Cd%20%3D%20168.89%20%5C%20m)
The speed of the tip of a blade 10 s after the fan is turned off is calculated as;
![v = \frac{d}{t} \\\\v = \frac{168.89}{10} \\\\v = 16.889 \ m/s](https://tex.z-dn.net/?f=v%20%3D%20%5Cfrac%7Bd%7D%7Bt%7D%20%5C%5C%5C%5Cv%20%3D%20%5Cfrac%7B168.89%7D%7B10%7D%20%5C%5C%5C%5Cv%20%3D%2016.889%20%5C%20m%2Fs)
Therefore, the speed of the tip of a blade 10 s after the fan is turned off is 16.889 m/s.
Answer:
The idea that hard work is the most important aspect of new inventions existed before Edison gave his quote, however.
The idea behind this quote is that it is easy to have a good idea, or a creative insight. However, to follow through with that idea, and turn it into a reality, takes a level of patience and dedication that few people have.
Explanation:
Answer:
B. The truck and mosquito exert the same size force on each other.
Explanation:
Newton's third law (law of action-reaction) states that
"When an object A exerts a force (action) on an object B, then object B exerts an equal and opposite force (reaction) on object A"
In this case, we can call
object A = the truck
object B = the mosquito
Thereforce according to Newton's third law, the force exerted by the truck on the mosquito is equal in magnitude to the force exerted by the mosquito on the truck (and in opposite direction).
The reason for which the mosquito will experience much more damage is the fact that the mosquito's mass is much smaller than the truck's mass, and since the acceleration is inversely proportional to the mass:
![a=\frac{F}{m}](https://tex.z-dn.net/?f=a%3D%5Cfrac%7BF%7D%7Bm%7D)
the mosquito will experience a much larger deceleration than the truck, therefore much more damage.
False, the inertia does not keep us moving in a circle on a spinning ride at the fair.
Answer: Option B
<u>Explanation:
</u>
Inertia is the resisting force of any object which resists in change in their state. If an object is moving the inertia will act in opposing direction to the force acting on the object stopping its motion.
Similarly, if an object resembles at rest, then the inertia will be acting against the force tending to move that stationary object. So, on a spinning ride at fair, when a person sits there, the inertia acting on the person will prevent the person to falling down from the fair and not in moving in a circle.