How much work is done against the gravitational force on ...
How much work is done against the gravitational force on a 3.0 kg object when it is carried from the ground floor to the roof of a building, a vertical climb of 240 m?
7.2 kJ
4.6 kJ
6.8 kJ
8.4 kJ
Correct answer is A
The work done against the gravitational force is calculated using the formula W = mgh, where m is the mass of the object, g is the acceleration due to gravity (approximately 9.8ms2 on Earth), and h is the height. Substituting the given values, we get W = 3.0 kg * 9.8m/s2 * 240 m = 7.2 kJ. Therefore, the correct answer is '7.2 kJ'.
It is easier to roll a barrel full of coal tar than to pull it because ...
Which of the following correctly explains why soft iron is prefered to steel in electromagnets? i...
At what frequency would a 10H inductor have a reactance of 2000Ω? ...
The electricity meters in houses measure energy unit consumed in ...