Answer:
25 m/s
Explanation:
This question can be solved using equation of motion
![v^2 = u^2 + 2as](https://tex.z-dn.net/?f=v%5E2%20%3D%20u%5E2%20%2B%202as)
where
v is the final velocity
u is the initial velocity
s is the distance covered while moving from initial to final velocity
a is the acceleration
_____________________________________________
Given
box moved for distance of 62.5 m
Friction slows the box at –5.0 m/s2----> this statement means that there is deceleration , speed of truck decreases by 5 m/s in every second until the box comes to rest. Friction causes this deceleration.
thus in this problem
a = -5.0 m/s2
V = 0 as body came to rest due to friction deceleration
u the initial velocity we have to find
the initial velocity of box will be the same as speed of truck, as the box was in the truck and hence box will pick the speed of truck.
so if we find speed of box, we will be able get sped of truck as well.
using equation of motion
![v^2 = u^2 + 2as\\0^2 = u^2 + 2*-5* 62.5\\0 = u^2 - 625\\u^2 = 625\\\sqrt{u^2} = \sqrt{625} \\u = 25](https://tex.z-dn.net/?f=v%5E2%20%3D%20u%5E2%20%2B%202as%5C%5C0%5E2%20%3D%20u%5E2%20%2B%202%2A-5%2A%2062.5%5C%5C0%20%3D%20u%5E2%20-%20625%5C%5Cu%5E2%20%3D%20625%5C%5C%5Csqrt%7Bu%5E2%7D%20%3D%20%5Csqrt%7B625%7D%20%5C%5Cu%20%3D%2025)
Thus, initial speed with the truck was travelling was 25 m/s.
Answer:
Math Skills Calculating Kinetic Energy and Potential Energy ... moving object depends on its mass and speed. ... represents the object's speed, measured in meters per second (m/s). ... Example 1: A bicycle and rider with a combined mass of ... the bicycle and rider? Given: m = 110 kg v = 8 m/s. Unknown: Kinetic energy (KE).
I think
Explanation:
I might want to do fire related crime examination as it would be so magnificent to dissect or research on the off chance that it was illegal conflagration or an inadvertent. It is cool to examine a blast and see where it originated from and who may have done it.
Discovering where everything started and having it lead me to every one of these focuses would energize.
I’m just gonna try an wander the the best I can, sorry if this is wrong I haven’t been taught this subject yet-
I’m Guessing its sublimating
( I’m sorry if this is wrong, remember I haven’t been taught this yet I’m only in 6th-)