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 
Answer:
1.43x1000= 1430km
Explanation:
if it travels 1.43 km in 1 sec in 1000 it travels x1000 which is 1430
Determined by cross product or ( vector product )
Explanation:
Given:
v₀ = 250 mph
v = 0 mph
t = 25 s
Find: a
v = at + v₀
(0 mph) = a (25 s) + (250 mph)
a = -10 mph/s