Answer:
Units of work would be equivalent to a Newton times a meter. ... An individual force does NOT do positive work upon an object if the object is moving at ... FALSE - Watt is the standard metric unit of power; Joule is the standard metric unit of energy. ... TRUE - A kg•m2/s2 is a mass unit times a speed squared unit, making it a ...
Answer:
14112 J
Explanation:
When the 72 Kg mass explodes into two, one mass is twice the other so 72/3=24 Kg
M1= 24 kg, M2= 72-24=48 kg
From law of conservation of linear momentum, the sum of initial and final momentum are equal. p=mv where p is momentum, m is mass and v is velocity. Fir this case, since the less massive piece stops, its final velocity is zero.
72*28=48v2
V2=72*28/48=42 m/s
Difference between initial and final kinetic energy will be
Therefore, from observers reference, kinetic energy of 14112 J is added
In series connections, the flow of electrons follow the same path as the current remains constant in all the elements of the circuits.
And the total resistance of the circuit increases as more resistors are added to the circuit in serial manner.
Option A and D
<u>Explanation:</u>
A circuit consists of number of passive and active devices in it. And depending upon the connections between the passive devices, the flow of current and potential drop across them will be specified.
Like if the passive devices are connected parallel to each other, the current flow through each device will vary but the voltage drop will be same. Similarly, if the passive devices are connected in series, then the current flow will be constant in the devices but the potential drop will vary.
Thus, in series connections, the flow of electrons follow the same path as the current remains constant in all the elements of the circuits. And the total resistance of the circuit increases as more resistors are added to the circuit in serial manner.
B.) acceleration.
hope this helps:)
