Question

a mechanic strikes a nail with hammer moving with a velocity of 20 metre per second raise to minus one the hammer comes to rest in 0.02 seconds after striking the nail calculate the acceleration of the nail

Answer 1

I THINK IT SHOULD BE
0-20÷0.02
-2000÷2
-1000m÷sec. ^2

Answer 2

u= 20 m/s
v= 0m/s
t= 0.02 sec
a = v - u /t
a = 0 - 20 / 0.02
a = -20 / 0.02
a = -2000 / 2
a = -1000 m/s^2

hope you understand.