Question

1. a student pushes a box up a ramp that is 3 meters long and 1.2 meters high. if the box weighs 150 n, calculate the useful work done in lifting the box.

Explanation:

Step1: Identify the formula for work

The formula for work done in lifting an object is $W = F\times d$, where $F$ is the force and $d$ is the displacement in the direction of the force. Here, the force is the weight of the box and the displacement in the direction of the force (against gravity) is the height of the ramp.

Step2: Substitute the values

The weight of the box $F = 150\ N$ and the height of the ramp $d=1.2\ m$. So, $W = 150\times1.2$.

Step3: Calculate the work

$150\times1.2 = 180\ J$.

Answer:

$180\ J$