Question

A body of mass 1 kg is projected vertically up with K.E. equal to 196 J. The height at which its K.E. is equal to its P.E. is

Answer 1

Answer:

h=20m after rounding off solution is in the picture.you can also take g =9.8m/s²

Answer 2

Answer:

Explanation:

Given,

Mass, m = 1 kg

K.E = 196 J

To Find,

Height at which the K.E = P.E

Formula to be used,

P.E = mgh

Solution,

Here, we know that K.E = P.E at a certain height.

So, K.E = P.E = 196 J

Putting all the values, we get

P.E = mgh

⇒ 196 = 1 × 9.8 × h

⇒ 196 = 9.8 × h

⇒ h = 196/9.8

⇒ h = 1960/98

⇒ h = 20 m.

Hence, the height at which its K.E. is equal to its P.E. is 20 m.