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?

Answer 1

Answer:

900 J

Explanation:

$pe = mgh$

Therfore PE of sled =(45 × 10 ×2 ) J = 900 J

Answer 2

AnswEr :

›»› The potential energy of the sled is 882 Joules (J).

Given :

• Height of the sled = 2 m.
• Mass of the sled = 45 kg.

To Find :

• Potential energy of the sled = ?

Solution :

We know that, if we are given with the height of the sled and the mass of the sled then we have the required formula, that is,

→ PE = mgh.

Here,

• PE is the Potential energy.
• m is the Mass.
• g is the Acceleration due to gravity.
• h is the Height.

We know the value of acceleration due to gravity is 9.8 m/s² or 10 m/s².

Here we will use 9.8 m/s² for acceleration due to gravity.

Substituting the all given values in the formula, we get :

→ PE = 2 × 45 × 9.8

→ PE = 90 × 9.8

→ PE = 882

Hence, the potential energy of the sled is 882 Joules (J).