Answer:
height = 3.2 meters (approximately)
Step-by-step explanation:
Potential energy is usually defined as the amount of energy that is stored in an object by virtue of its position. It is denoted by P.E.
Mathematically,
⇒ P.E = mass × gravity × height
Given that,
P.E = 400 J
Mass, m = 1220 kg
Gravity can be taken as, g = 9.8 m/sec²
⇒ 400 = 1220 × 9.8 × height
⇒ Height = 400 ÷ (1220 × 9.8)
⇒ Height = 400 ÷ 124.5
⇒ Height = 3.2 meters