G.P.E = mgh
Weight = mg = 200N
So G.P.E = 200 * 2 = 400 Joules
Answer:
(a) 300 ft
(b) 60 ft/s
Explanation:
distance
where a is acceleration and t is time

Also, d=vt where v is the velocity
d=30t
Therefore
hence t=10 s
Substituting t is either formula
d=30t=30*10=300 ft
Also
v=at hence 
Answer:
N = 3600 N
Explanation:
centripetal acceleration requirement is
ac = v²/r = 20²/50 = 8 m/s²
As the only available acceleration is gravity, centripetal acceleration must come from that,
This makes the "weight" that the road senses and must counteract
N = m(g - ac)
N = 2000(9.8 - 8)
N = 3600 N