This causes nickel and certain other metals to be magnetic.
2 answers:
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Answer:
12.35m
Explanation:
Hello! To solve this problem we must consider the following:
1. The car moves with constant speed, which means that the distance traveled is equal to the multiplication of time by speed.
X = VT
we solve the equation for time
2. The bolt moves with constant acceleration, with acceleration of 9.81m / s ^ 2, so we could apply the following equation.
note=remember that "a uniformly accelerated motion", means that if the velocity is plotted with respect to time we will find a line and its slope will be the value of the acceleration, it determines how much it changes the speed with respect to time.
where
Vo = Initial speed
=0
T = time
=1.588s
g =gravity=9.8m/s^2
Y = bridge height
solving
Answer:
Afterward the magnitude of the acceleration of the stone is four times as great
Explanation:
A stone tied to a string and whirled at a constant speed in a horizontal circle will have a centripetal acceleration given by
Where is the centripetal acceleration
is the speed
and is the radius of the circle
Here, the radius of the circle is the length of the string.
Now, from the question
The speed is then doubled without changing the length of the string,
Let the new speed be , that is
and without changing the length of the string means radius is constant.
To determine the magnitude of the acceleration of the stone afterwards,
Let the new acceleration be .
Then we can write that
From
Recall that
∴
Now, we will put the value of into
Then,
The new magnitude of the acceleration of the stone is four times the initial acceleration.
Hence,
Afterward the magnitude of the acceleration of the stone is four times as great