Question 5 of 30 A book with a mass of 3.3 kg sits on a bookshelf, if it has a gravitational
potential energy of 57 J how high is the shelf? The acceleration of gravity is
9.8 m/s2
0
A 2.5 m
B. 1.5 m
C 3.6 m
OD 1.8m
SUBMIT

irrational, cannot

option (a)

step-by-step explanation:

step 1:   take 2 number whose product equal to 25..

and sum of those two number are -10

step: 2 for example here if we take 5,5 are the number,,

5*5=25

and

5+5=10

but we need -10

so if we take   -5,-5

so -5*-5=25

and -5+(-5)=-10

s0

come the equation

replace -10x by these number

like -5x -5x+25

take common

x(x-5)-5(x-5)=0

(x-5)(x-5)=0