Question

1 a. a boy carries a box with a weight of 70 n up a flight of stairs 20m high. how much potential energy has the box gained? f(ind): k(now): s(olve):

Explanation:

Step1: Identify the formula

The formula for gravitational potential energy is \(E_p = W\times h\), where \(W\) is the weight and \(h\) is the height.

Step2: Substitute the values

Given \(W = 70\space N\) and \(h=20\space m\), substitute into the formula: \(E_p=70\times20\).

Step3: Calculate the result

\(70\times20 = 1400\space J\).

Answer:

The box has gained \(1400\space J\) of potential energy.