You can enter units that are combinations of units with prefixes. however, you must maintain the same unit system given in the p

Question

2 years ago

6

You can enter units that are combinations of units with prefixes. however, you must maintain the same unit system given in the p

roblem. for example, this question uses the si unit system. therefore an answer in u.s. customary units, such as miles per hour would not be accepted as correct. a car traveling with constant speed travels 150 km in 7200 s. what is the speed of the car?

Physics

2 answers:

gtnhenbr [62] · Answer 1 · 2023-04-13T11:04:32+03:00

Speed of the car: 20,833 m/s (or 21 m/s, two significant figures)

<h3>Further explanation</h3>

Regular straight motion is the motion of objects on a straight track that has a fixed speed

Formula used

$\large {\boxed {\bold {S = v \times \: t}}}$

S = distance = m

v = speed = m / s

t = time = seconds

Straight motion changes regularly are the straight motion of objects that have a fixed acceleration

Formula used

$\large {\boxed {\bold {St = vo.t + \frac {1} {2} at ^ 2}}}$

V = vo + at

Vt² = vo² + 2as

St = distance on t

vo = initial speed

vt = speed on t

a = acceleration

Each country usually has its own unit system. For example in the UK with inches and feet, Indonesia with "hasta", etc.

With the existence of these various units, we also need a variety of measuring devices in accordance with the specified units, and also conversion is needed from one unit to another. Therefore it is now agreed that there is a unit that is used as a standard that is an international system unit abbreviated as SI

There are 7 standard SI units used, namely: