Question

The Kinetic Energy of a 2kg object thrown upwards is 4J , how high will it go ( take gravity= 10 m/s)

Answer 1

Answer:

Conserving he energy, we get

KEi+PEi=KEf+PEf

⇒490+0=(0.5×490)+mgh

⇒h=(490−245)/(2×9.8)

⇒h=12.5m

Answer 2

Answer:

12.5

Step-by-step explanation:

Conserving he energy, we get

KE  

i

​  

+PE  

i

​  

=KE  

f

​  

+PE  

f

​  

 

⇒490+0=(0.5×490)+mgh

⇒h=(490−245)/(2×9.8)

⇒h=12.5m

Hence, correct answer is 12.5