A piece of transparent material that is used to focus light and form a image
2 answers:
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Answer: a) It will take more time to return to the point from which it was released
Explanation: To determine how long it takes for the ball to return to the point of release and considering it is a free fall system, we can use the given formula:
, where:
d is the distance the ball go through;
v₀ is the initial velocity, which is this case is 0 because he releases the ball;
a is acceleration due to gravity;
t is the time necessary for the fall;
Suppose <em>h</em> is the height from where the ball was dropped.
On Earth:
h=0.t +
h = 5t²
=
On the other planet:
h = 0.t +
h = 15.t²
=
Comparing the 2 planets:
=
or
Comparing the two planets, on the massive planet, it will take more time to fall the height than on Earth. In consequence, it will take more time to return to the initial point, when it was released.
Answer:
Explanation:
To solve this problem we need to apply the concept related to Angular Acceleration. We can find it through the equation
Where for definition,
The number of revolution was given by 20 times, then
We know as well that the salad rotates 6 more times, therefore in angle measurements that is
The cook at the end stop to spin, then using our first equation,
re-arrange to solve ,
We can know find the required time,
Re-arrange to find t, and considering that
Therefore take for the salad spinner to come to rest is 3 seconds with acceleration of
Answer:
t=67.7s
Explanation:
From this question we know that:
Vo = 6m/s
a = 1.8 m/s2
D = 1500m
And we also know that:
Replacing the known values:
Solving for t we get 2 possible answers:
t1 = -44.3s and t2 = 67.7s Since negative time represents an instant before the beginning of the movement, t1 is discarded. So, the final answer is:
t = 67.7s