Answer:
4kg
Explanation:
Given parameters:
Kinetic energy = 1.6J
Velocity = 0.2m/s
Unknown:
Mass of the body = ?
Solution:
The kinetic energy of a body is the energy due to the motion of the body.
It is mathematically expressed as;
Kinetic energy = 
m v²
m is the mass
v is the velocity
1.6 = x 0.2 x v²
1.6 = 0.1v²
v² = 16
v = 4kg
The answer is the change in kinetic energy
K = 1/2 • mv^2
Change in K = (1/2 • 20 • 10^2) - (1/2 • 20 • 5^2)
Change in K = 1000 - 250 = 750J
Explanation:
The junction rule says that the sum of the currents going into a junction must equal the sum of the currents leaving a junction. This describes the conservation of current.
Answer: (D)
Explanation: just took the quiz and got a 100!
