Answer:
0.122 m/s
Explanation:
mass of first train, m1 = 150,000 kg
initial velocity of first train, u1 = 0.3 m/s
mass of second train, m2 = 110,000 kg
initial velocity of second train, u2 = - 0.120 m/s
let the velocity of coupled mass after the collision is v.
Use the conservation of momentum
Momentum of trains before collision = Momentum of trains after collision
150000 x 0.3 - 110000 x 0.120 = (150000 + 110000)v
45000 - 13200 = 260000 v
31800 = 260000 v
v = 0.122 m/s
Thus, they travel with the speed of 0.122 m/s towards right after collision.
Answer:
F = 132N
Explanation:
Let the pulling force be F
Given the mass of the barrel is 12 Kg and The acceleration is 1.2 m/
We know that Net Force =
Now net force = F - mg
F - mg = ma
F = mg + ma
F = m(a+g) =
Note that there will be a downward force acting on the body which is equal to mg
Neutral reaction is the reaction that occurs when an acid cancels with a base
Answer:
m<2 = 86
Explanation:
Vertical angles means the angles are equal to each other so:
<1 = <2
17x + 1 = 20x - 14
17x - 20x = -14 - 1
-3x = -15
x = 5
m<2:
20x - 14
20(5) - 14
100 - 14
86
Cause bubbles are magical