Water is more dense in its solid state.
2 answers:
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Positive acceleration occurs when an object speeds up.
Explanation:
Acceleration is the rate of change in velocity per unit time:
where is the change in velocity while
is the time interval. From the formula, we can understand that when
is positive, so when the object is speeding up, the acceleration is positive; on the contrary, when
is negative (so, when the object is slowing down), the acceleration is negative.
Explanation:
It is given that,
Radius of bowl, r = 3 m
A small block is released from rest from the edge of a large hemispherical friction less bowl. Let v is the speed of the mass when it passes through the bottom of the bowl and u is the initial speed of the mass, u = 0. Using conservation of energy as :
h = r = 3 m
v = 7.66 m/s
or
v = 7.7 m/s
So, the speed of the mass at the bottom of the bowl is 7.7 m/s. Hence, this is the required solution.