Question

a sled is at rest at the top of a slope 2 m high. the sled has a mass of 45 kg. what is the sled’s potential energy? (formula: pe = mgh)
90 j
56.8 j
441 j
882 j

Explanation:

Step1: Identify given values

Mass \( m = 45 \, \text{kg} \), height \( h = 2 \, \text{m} \), gravitational acceleration \( g = 9.8 \, \text{m/s}^2 \) (standard value).

Step2: Apply potential energy formula

Using \( PE = mgh \), substitute the values:
\( PE = 45 \times 9.8 \times 2 \)

Step3: Calculate the result

First, \( 45 \times 9.8 = 441 \), then \( 441 \times 2 = 882 \). So \( PE = 882 \, \text{J} \).

Answer:

882 J (corresponding to the option: 882 J)