Answer:
The tension is 14 N
Explanation:
For this problem we have to use newton's law, so:
The second string is connected to the mass of 8 kg, but the mass of 8 kg is connected to the mass of 20kg, so we can say that the second string is handling the two masses. so:
Answer:
B. the force of on the truck due to the collision is exactly equal to the force on the car.
Explanation:
At the time of collision between two objects of unequal or equal masses two forces emerge at the point of collision .They are called action and reaction force . According to third law of Newton , they are equal . So in the instant case of collision between car and truck , force on both of them will be equal.
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Answer:
The first option, energy is transferred.
Explanation:
Answer: a)5.73 *10^-6 C/m^2; b)648*10· N/C c)56.5 *10^3 Nm^2/C
Explanation: Considering the definition of surface charge density as:
σ = Q/ area of sphere
so Q = σ * 4*π* R^2outer
The new Q at the outer radius is: Q initial -0.5 microC =5 micro C
The Electric with the new outer charge is equal to:
E= k*Q / R^2outer= 9 10^9* 5 microC/(0.25m)^2= 648*10^3 N/C
Finally the flux corresponding to the internal charge is equal to
By using Gauss law, the total flux is equal to net change divided ε0
so this is 0.5 microC/ ε0= 56.5 *10^3 Nm^2/C
