Answer:
Whats The Question Exactly (Ill Edit This To Fit It)
Explanation:
Answer:
Explanation:
Given that
There's a change in friction from 440 kJ to 110 kJ
This change is as a result of conversion of energy. The energy of the car system converted the mechanical energy in it, into a corresponding heat energy. During the course of this conversion, is where a whopping 330 kJ of energy went missing.
The 330 kJ of energy was lost as a result of the conversion of mechanical energy into heat energy by the use of friction.
Answer:
Apparent frequency increases for Bob and decreases for Jill.
Explanation:
Doppler effect refers to the apparent change in frequency when there is relative motion between source and the listener. When the source and listener move closer, the apparent frequency heard by the listener increases. And when the source and listener move away from each other, the apparent frequency heard by the listener decreases.
Thus, when the emergency vehicle approaches Bob, the apparent frequency of the siren increases. It moves away from Jill, the apparent frequency heard by the Jill decreases.
Explanation:
It is known that the relation between force and acceleration is as follows.
F = -ma ............ (1)
Also, acceleration (a) =
......... (2)
The given data is as follows.
v = 0, u = 14 m/s, s = 1
Therefore, putting the values of expression (2) into expression (1) as follows.
F = ![-m \times \frac{v^{2} - u^{2}}{2s}](https://tex.z-dn.net/?f=-m%20%5Ctimes%20%5Cfrac%7Bv%5E%7B2%7D%20-%20u%5E%7B2%7D%7D%7B2s%7D)
= ![-61 kg \times \frac{(0)^{2} - (14)^{2}}{2 \times 1}](https://tex.z-dn.net/?f=-61%20kg%20%5Ctimes%20%5Cfrac%7B%280%29%5E%7B2%7D%20-%20%2814%29%5E%7B2%7D%7D%7B2%20%5Ctimes%201%7D)
= 5978 N
thus, we can conclude that net force on the person if he or she is wearing a seat belt and if the air bag deploys is 5978 N.
Gravity<span> attracts </span>all objects<span> towards one </span>another<span>.</span>