Answer:
the answer is that you will never be able to find two pretty bestfriends
<span>
Technically, you can simply point out that "acceleration" MEANS
"change in velocity", so of course they have the SAME direction.</span>
solution:
the spring force exerted by spring with spring constant k is given by
where k is spring constant
and x is deformation of spring
in order to calculate word done by the spring
the work done by the spring as it is compressed from x=0 to x=L
inserting the limits x=0 and x=L
we get work done in terms of k and L
Answer: 65mph, 75mph
Explanation:
Let us assume x to be the speed of the slower train, in mph (miles per hour).
Then the speed of the other train is (x+10) mph, according to the question.
We then would have an equation like this
1.6x + 1.6(x+10) = 224.
This is because, the first addend in the left side is the distance covered by the slower train.
The second addend in the left side is the distance covered by the faster train.
The sum is 224 miles, because they together covered all the distance to the moment when they meet each other.
1.6x + 1.6x + 16 = 224
3.2x + 16 = 224
3.2x = 224 - 16
3 2x = 208
x = 208/3.2
x = 65
Thus the speed of the slower train is 65mph, and that of the other train is 65 + 10 = 75mph
Answer:
19129.5 N
1.1831 m
Explanation:
m = Mass of person = 65 kg
t = Time taken
u = Initial velocity
v = Final velocity
s = Displacement
a = Acceleration = 30g
g = Acceleration due to gravity = 9.81 m/s²
Force is given by
The force on the person is 19129.5 N
The distance traveled if brought to rest is 1.1831 m