if there is a duck behind two ducks and a duck between two ducks and a duck in front of two ducks how many ducks are there? look
1 answer:
You might be interested in
(a) The initial speed at which the bottles are launched is 4.27 m/s.
(b) The horizontal displacement at which the bottle land is 1.75 m.
<h3>Initial speed of the bottle</h3>The initial speed of the bottle is calculated as follows;
where;
- T is time of flight
- u is the initial speed
2usinθ = Tg
u = Tg/(2sinθ)
u = (0.5 x 9.8)/(2 x sin35)
u = 4.27 m/s
<h3>Horizontal displacement of the bottle</h3>X = u²sin(2θ)/g
X = (4.27² x sin(70))/(9.8)
X = 1.75 m
Learn more about projectile here: brainly.com/question/12870645
#SPJ1
Answer:
Explanation:
Given
mass of book(m)=2.1 kg
height up to which book is lifted is (h)2.2 m
height of person
Potential energy of book relative to ground=mgh
(b)PE w.r.t to person head =mg(h-h0)
work done by person in lifting box 2.2 m w.r.t floor
Word done =Potential Energy of box relative to floor=45.2 J