What is exact change in position of the particle?
Risposta:
Change in position is also called displacement. It is a vector quantity.
Spiegazione:
Dato #f(t)=15-5t#
at #t=0#, #f=15#
at #t=1#, #f=10#
at #t=2#, #f=5#
at #t=3#, #f=0#
at #t=4#, #f=-5#
Plot graph as below
#"Displacement"="Area under the curve for "t=0 to t=4#
Sappiamo che #"Area of a triangle "=1/2xx"base"xx"height"#
#:. "Displacement"="Area of "Delta ABC+"Area of "Delta CDE#
#=> "Displacement"=1/2xx3xx15+1/2xx(-5)xx1#
#=> "Displacement"=22.5-2.5=20cm#