I believe the answer is coal
Answer:

Explanation:
Kinetic energy, 
while potential energy, PE= mgh where m is the mass, v is the velocity of the ball, g is acceleration due to gravity and h is the height.
The question requires kinetic energy hence we use the 
Since the figures are not given, we maintain that 
It is not possible to find a vector quantity of magnitude zero but components different from zero
The magnitude can never be less than the magnitude of any of its components
Answer:
W=16.58J
Explanation:
initial information we have
work: 
stretched distance: 
from this, we can find the value of the constant of the spring k, with the equation for work in a spring:

substituting known values:

and clearing for k:

and now we want to know how much work is done when we stretch the spring a distance of 6.5cm from equilibrium, so now x is:

and using the same formula for work, with the value of k that we just found:


The ball rolled for 13.2 s
<h3>Further explanation</h3>
Speed is scalar and no direction

A bowling ball rolls 33 m, with average speed = 2.5 m/s
So elapsed time :
