Answer:
The gravitational potential energy of a squirrel is 53.312 J.
Explanation:
We have,
Mass of a squirrel is 0.68 kg
It is placed at a height of 8 m above the ground.
It is required to find the gravitational potential energy of a squirrel. It is possessed by an object due to its position. Its formula is given by :

So, the gravitational potential energy of a squirrel is 53.312 J.
Sliding and Static.
Would be the right one here.
This means it doesn't change its velocity and it doesn't have momentum. 3. Examples of Newton's 1st Law If you slide a hockey puck on ice, eventually it will stop, because of friction on the ice. It will also stop if it hits something, like a player's stick or a goalpost.
Answer:
(a) Ball with 6.35 rev/sec gives greater speed
(b) So centripetal acceleration of ball with rotation 8.16 m/sec
So centripetal acceleration of ball with rotation 6.35 m/sec
Explanation:
(a) In first case angular speed
rev/sec and length of the chain = 0.8 m
So velocity 
In second case angular speed angular speed
and length of the chain that is r = 0.6 m
So velocity 
So 6.35 rev/sec gives greater speed
(b) Centripetal acceleration is given by 
So centripetal acceleration of ball with rotation 8.16 m/sec
So centripetal acceleration of ball with rotation 6.35 m/sec