A 15-kg block of ice is sitting at rest on a frozen lake. A 3-kg
1 answer:
The velocity of block/snowball combination will be 2.1 m/sec. The conservation of momentum principle is employed in the given problem.
<h3>What is the law of conservation of momentum?</h3>According to the law of conservation of momentum, the momentum of the body before the collision is always equal to the momentum of the body after the collision.
The given data in the problem is;
(m₁) is the mass of block of ice= 15-kg
(u₁) is the initial velocity of 1st cart (u₁) = 0
(m₂) is the mass of snowball = 3-kg
(u₂) is the initial velocity of snow ball = 35 m/s.
(v) is the velocity after collision =.?
According to the law of conservation of momentum;
Momentum before collision =Momentum after collision
Hence, the velocity of block/snowball combination will be 2.1 m/sec.
To learn more about the law of conservation of momentum, refer;
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Answer:
The internal resistance of the cell is 0.051 ohm.
Explanation:
Given;
emf of the battery, E = 12 V
terminal voltage of the cell, V = 8.2 V
current in the circuit, I = 75 A
let the potential drop of the cell due to internal resistance (r) = Ir
The internal resistance of the cell is calculated from the equation below;
E = V + Ir
where;
r is the internal resistance of the cell
Therefore, the internal resistance of the cell is 0.051 ohm.
If series Rs = R1 + R2
