Given :
A race car moves along a circular track of radius 100m at a velocity of 25m/s.
To Find :
(a) What is the time taken to complete one lap of the circular track.
(b) What is the time taken for 10 laps.
Solution :
Circumference of circular track,
a) Time taken to complete one lap is :
b) Time taken to complete 10 laps is :
Hence, this is the required solution.
Physical science explains the physical world and not supernatural events and an idea is considered true by science if it can be observed, explained and reproduced by others.
<h3>What is physical science?</h3>
Physical science is a systematic study of the of the physical world and phenomena based on observation and experiments.
The scientific method involves:
- observation and questions
- hypothesis
- experiments
- results and further experiments
- theories and laws
Science explains the physical world and not supernatural events.
Science studies physical phenomena such as the stars, the planets, living things, etc.
Science do not study about angels or demons or supernatural events.
An idea is considered true by science if it can be observed, explained and reproduced by others.
Learn more about physical science at: brainly.com/question/4431224
#SPJ1
To determine the velocity of the ball falling, we need to use one kinematic equation which will allow as to calculate for the height of the skyscraper. This formula is expressed as:
y = v0t + at^2 / 2
v0 = 0 since it started at rest
a = g since it acts upon the gravitational force
t = 5 s
y = (9.81)(5)^2 / 2
y = 122.625 m
To obtain velocity we divide the height with time,
v = 122.625 / 5 = 24.53 m/s
closest would be option C.
