Why does a balloon filled with the air from your lungs sink to the ground but a balloon filled with Helium floats ?
1 answer:
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Power is defined as the rate at which the body is doing work:
Work is defined as displacement done by the force times that displacement:
We know that we need 62N to move the box, so when we apply this force along the path of 10m we have done:
of work.
Now we just divide that by 5s to get how much power is required:
Work is defined as displacement done by the force times that displacement:
We know that we need 62N to move the box, so when we apply this force along the path of 10m we have done:
of work.
Now we just divide that by 5s to get how much power is required:
Answer:
i) 5 /
ii) 54
iii) 54
Explanation:
i) ⇒
= 5² ÷ 5 = 5
ii) ⇒
= 108 ÷ 10 = 10.8
,
⇒
10.8 × 5 = 54
iii) F1 = F2 = 54
Answer:
a.6.5025 J
b.6.5025 J
Explanation:
We are given that
Mass of pellet,m=0.27 g=
1 kg=1000 g
Spring constant,k=1800 N/m
x=8.5 cm=
1m=100 cm
a.Potential energy stored in the compressed spring is given by
P.E=
b.By using law of conservation of energy
P.E of spring=K.E of the pellet
K.E of the pellet=6.5025 J