Answer:
31 mins
Step-by-step explanation:
22.7+8 3/10=31 mins
Answer:
P.E = mgh = 120N
Step-by-step explanation:
v² = u² - 2as
At the top, the velocity is = 0
0² = 4² - 2 x 10 x s
4² = 20s
s = 16/20
s = 0.8metres.
It rose only 0.8metres.
Therefore P.E = 15 x 10 x 0.8
:. P.E = 15 * 8
:. P.E = 120N

Convert the mixed number to an improper fraction:

Subtract the fractions to get your final answer:

Answer:
8.5= w -12 (add 12 to both sides)
20.5= w
Step-by-step explanation: