Answer:
The kinetic energy of the clam at a height of 5.0 m is 5.19 J and the speed of the clam at that height is 9.71 m/s.
<u>Explanation:
</u>
<em>Mechanical energy is constant throughout the travel</em>, we know that <em>mechanical energy is calculated by adding potential energy and kinetic energy</em>. Potential energy =
,
Kinetic energy =
and Mechanical energy =
Kinetic energy is zero at initial point. Now mechanical energy of clam with m=0.11kg,g=9.81
,h=9.8 m is = 0.11×9.81×9.8 = 10.58 J.
Mechanical energy of clam at a height of 5.0 m =
=
. We know that mechanical energy is constant hence, <em>mechanical energy of clam at height 9.8 m is equal to mechanical energy at height 5.0 m</em>. This is represented as following
10.58 =
10.58 – 5.39 =
5.19 =
kinetic energy of the clam is 5.19 J.
Now speed of the clam at height 5.0 m is 5.19 =
94.36 =
= 9.71 m/s. The speed of the clam is 9.71 m/s.