Answer:
B.6
Explanation:
speed = distance / time
= 75m / 12s
= 6.25 m/s
The closest answer is b. 6 m/s
heart plz
1nm = 10^-9m
1micro = 10^-6m
1mm=10^-3m
10nm = 10x!0^-9m = 10^-8m
<h2>The initial velocity is 2.3
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Explanation:
Suppose the speed of car at point A is u .
Its kinetic energy K = mu²
At point B , its kinetic energy = K
and its gravitational potential energy = K = m g h = 2 m g R
here height h = 2 R ( radius of circle )
From the principle of conservation of energy
m u² = m u² + 2 m g R
m u² = 2 m g R
Therefore u = = 2.3
Smooth ice reduces the unbalanced forces that would slow the hockey puck.