Respuesta :
Answer:
option C
Explanation:
given,
gain of potential energy = 10 J
height of lift = 2 m
Let mass of the first object be m
for second object
mass is decrease to = 0.5 m
vertical height lifted = 2 m
P = m g h
10 = m x 9.8 x 2
m = 0.51 kg
new mass of the object = 0.5 x 0.51 = 0.255 Kg
potential energy gain
P = m g h
P = 0.255 x 9.8 x 2
P = 5 J
hence. the correct answer is option C
Answer:
5. J
Explanation:
Given:
- energy gain by an object of mass 'm', [tex]U_1=10\ J[/tex]
- height of raising the mass, [tex]h_1=2\ m[/tex]
- height of raising the second mass "0.5 m' , [tex]h_2=2\ m[/tex]
As we know that potential energy is given as:
[tex]U=mgh[/tex]
So proportionally the the potential energy gain by the second mass:
[tex]U_2=\frac{m}{2} .g.h[/tex]
[tex]U_2=\frac{10}{2} [/tex]
[tex]U_2=5\ J[/tex]
