If a 2-kg ball is thrown through the air at 20 m/s what is the momentum of the ball?
1 answer:
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Answer:
The power dissipated in either one of the parallel resistors is 2 V
Explanation:
Given;
two parallel resistors, R₁ and R₂ = 2 ohms
The total resistance of the Two resistors of 2 ohms connected in parallel is;
when connected to another resistor of 1 ohm in series, the total resistance becomes;
Rt = R₁ + R₂
Rt = 1 + 1 = 2 ohms
Current in the circuit, I = voltage / total resistance
= 2 /2 = 1 A
the overall circuit has been resolved to series connection, and current flow in series circuit is constant.
Power = I²R
Thus, power dissipated in either one of the parallel 2 ohms resistors is;
Power = I²R = (1)² x 2 = 2 V
Answer: Option (b) is the correct answer.
Explanation:
Kinetic energy is the energy of an object or particle when it is in motion.
Mathematically, Kinetic energy =
It is given that toy truck has mass = 0.75 kg, and velocity = 4 m/s.
Calculate the kinetic energy as follows.
Kinetic energy =
=
=
=
=
or, Kinetic energy = 6 joules
Thus, we can conclude that kinetic energy of toy truck is 6 J.