The collision between a hammer and a nail can be considered to be approximately elastic. estimate the kinetic energy acquired by a 10 g nail when it is struck by a 550 g hammer moving with an initial speed of 3.5 m/s.

Here we can use momentum conservation as in this type of collision there is no external force on it

now here we can say

now here we can say

now by coefficient of restitution

for elastic collision we know that e = 1

now by solving the two equation

also we know that

so final speed of the nail is 6.875 m/s

when the use of electricity burdens the fuse and miniarure circuit beakers and there is a possibility of a fuse then they automatically cut off the electricity supply to your homes and after you fix the problem u jzt switch it on and it continues the supply of electricity to ur homes

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete