Answer:
(a) 294 J
(b) 229591.84 kg
Explanation:
height, h = 30 m
g = 9.8 m/s^2
(a) U = m x g x h
U = 1 x 9.8 x 30
U = 294 J
(b) Let the mass of water is m
U = m x g xh
80% of this energy per second is generating power
0.8 x m x 9.8 x 30 = 54 x 10^6
m = 229591.84 kg
Thus, the mass of water required is 229591.84 kg.
Answer:
Gravitational force will be 16 times more.
Explanation:
we know;
Gravitational force (F) = (Gm1m2)/d^2
when mass of each is doubled and distance between them is halved;
F= (G2m1×2m2)/(d/2)^2
=(4Gm1m2)/(d^2/4)
=4×4(Gm1m2)/d^2
=16(Gm1m2)/d^2
=16F
Uh I think it’s point guard
Answer:
Displacement by cyclist is zero.
Explanation:
In the given question bicyclist is travelling in a rectangular track having P , Q and R edges.
The bicyclist starts from P and travel through Q and R and returned to P again.
We need to find its displacement.
We know displacement of a body is its difference between its initial position to final position.
Here in the given question the bicyclist returns to P again.
Therefore, total displacement by bicyclist is zero.
Hence, this is the required solution.
