I believe the answer you are looking for is 1.4 N.
0.145*9.8=1.42
So you round 1.42 to 1.4
Hope this helps!
<span>We use m/s for the velocity, and m2/(V·s) for the </span><span>mobility.</span>
Answer:
option (e) is correct.
Explanation:
mass of adult, M = 81 kg
Gravitational Potential energy of adult, U = 2000 J
Let the height raised is h.
U = mass of adult x g x h
2000 = 81 x 9.8 x h
h = 2.52 m
mass of adult, m = 18 kg
height raised, h = 2.52 m
Potential energy of child, U' = m x g x h
U' = 18 x 2.52 x 9.8 = 444.44 J
Thus, option (e) is correct.