Answer:
+0.231 m/s
Explanation:
The problem can be solved by using the law of conservation of momentum. In fact, we have that the total momentum before the collision must be equal to the total momentum after the collision:
where we have
m1 = 245000 kg is the mass of the first car
m2 = 57500 kg is the mass of the second car
u1 = 0.513 m/s is the initial velocity of the first car
u2 = -0.125 m/s is the initial velocity of the second car
v = ? is the final velocity of the two cars together, after the collision
Solving the equation for v, we find
And the direction (positive sign) is the same as the initial direction of the first car.
Answer:
The speed of the pendulum is at maximum at x=0
This question can be solved with the help of the equations of motion.
A) The Frisbee will remain in the air for "5.87 s".
B) The frisbee will go "29.4 m" down the range.
A)
To calculate the time, the frisbee will remain in the air, we will use the second <em><u>equation of motion</u></em>, for the vertical motion.
where,
h = height = 169.2 m
vi = initial velocity's vertical component = 0 m/s
g = acceleration due to gravity = 9.81 m/s²
t = time = ?
Therefore,
<u>t = 5.87 s</u>
<u />
B)
Now, we will calculate the horizontal range by applying the equation for constant motion. Because the velocity in the horizontal direction will remain constant due to no air resistance
s = vt
where,
s = horizontal range = ?
v= initial velocity's horizontal component = 5 m/s
t = time = 5.87 s
Therefore,
s = (5 m/s)(5.87 s)
<u>s = 29.4 m</u>
<u />
Learn more about <em><u>equations of motion</u></em> here:
brainly.com/question/9772550?referrer=searchResults
I think it’s the second one: magnetic domains must come in pairs—one north and one south