Answer:
v = 3.65 m/s
Explanation:
It is given that,
Mass of the block, m = 5.44 kg
Horizontal force acting on the block, F = 7.4 N
We need to find the speed of the block after it has moved 4.9 meters. It can be calculated using the work energy theorem as:



v = 3.65 m/s
So, the speed of the block is 3.65 m/s. Hence, this is the required solution.
Technically, this delivers a lot of energy into the Earth, but it’s
spread out over a large enough area that it doesn’t do much more than
leave footprints in a lot of gardens. A slight pulse of pressure spreads
through the North American continental crust and dissipates with little
effect. The sound of all those feet hitting the ground creates a loud,
drawn-out roar which lasts many seconds.
Answer:
Explanation:
Given
Distance between two wires 
Current value 

(a)If current flows in opposite direction
When current Flows in opposite direction the two wires will repel each other
Force due to current carrying wire 


(Repulsive Force)
(b)If current is flowing in the same direction
When direction of current is same then force will be attractive in nature


(attractive Force)