[tex]guys plz solve this question for me..........[/tex]
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[tex]guys plz solve this question for me..........[/tex]
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initial velocity (u)= 20 m/s
final velocity (v)= 0 m/s
distance covered (s)=50 m
v² =u² + 2 as
u² = 2 a s
a= -400/100
a= -4 m/s²
F = u N
F = ma =1×4 =4 N
N= mg =1×9.8 =9.8 N
u =F/N
u=4/9.8
u=0.4
Answer:
4 Newton.
Explanation:
First we will find the value of deceleration of the iron sphere, according to the formula
Now, this deceleration must have came from frictional force, because no other force is present there to stop the ball.
Hence,
∵
-ve sign represents that the force is opposite to the direction of the motion.