If You did 150 joules of work lifting a 120 newton backpack.A) How high did you lift the backpack?B)how muck did the backpack weigh in pounds?
Hints:
Work = force * distance
mass = weight/g
To answer these questions, we need to use a few formulas and conversion factors.
A) How high did you lift the backpack?
The work done in lifting an object can be calculated using the formula:
Work = Force × Distance
In this case, the work done is 150 joules and the force applied is 120 newtons. We need to find the distance lifted.
Rearranging the formula, we have:
Distance = Work / Force
Plugging in the values:
Distance = 150 joules / 120 newtons
Calculating the value:
Distance = 1.25 meters
Therefore, you lifted the backpack to a height of 1.25 meters.
B) How much did the backpack weigh in pounds?
To convert from newtons to pounds, we need to use the conversion factor:
1 newton = 0.2248 pounds
The weight of the backpack is given as 120 newtons. To convert it to pounds, we can multiply it by the conversion factor:
Weight in pounds = 120 newtons × 0.2248 pounds/newton
Calculating the value:
Weight in pounds = 26.976 pounds
Therefore, the backpack weighs approximately 26.976 pounds.