dahnay carried a box (5,4)m.the box had a mass of
5kg.dahnay says that over 300J of work was done
on the box . is dahnay correct?explain the answer.
No
Yes
To determine whether Dahnay is correct in saying that over 300J of work was done on the box, we need to calculate the work done using the formula:
Work = Force * Distance * cos(angle)
First, we need to find the force applied to the box. The force can be calculated using the formula:
Force = Mass * Acceleration
Since the box is carried by Dahnay, it is not accelerating, so the force exerted by Dahnay is equal to the weight of the box. The weight of an object can be calculated using:
Weight = Mass * Gravity
where the value of gravity is typically 9.8 m/s².
Weight = 5 kg * 9.8 m/s²
Weight = 49 N
Next, we need to find the distance over which the box was carried. Given that the dimensions of the box are 5m x 4m, we can assume that Dahnay carried the box horizontally for 5m.
Distance = 5m
Now we can calculate the work done:
Work = 49 N * 5 m * cos(0°)
Work = 245 J
So, the work done on the box is 245J, not 300J. Therefore, Dahnay is incorrect in stating that over 300J of work was done on the box.