A force F is exerted on an object of mass m through a distance d. A force twice as large (2F) is exerted on a mass 2m also through the distance d. Explain the relation between the amount of work done in the two cases
What will be an ideal response?
In this case, there are two possible answers.
(1) The force and displacement are parallel or antiparallel.
because the distance is the same, the force that is twice as large does twice the work.
(2) The force and displacement are perpendicular.
No work is done, no matter what.
You might also like to view...
A 100-g sample of a certain substance undergoes a transformation of some kind that releases 20,000 J of energy. What kind of transformation is this likely to be?
A. A temperature change B. A phase change C. A chemical reaction D. A nuclear reaction E. It is impossible to guess.
A catapult is tested by Roman legionnaires. They tabulate the results in a papyrus and 2000 years later the archaeological team reads (distances translated into modern units):
angle of landing height = launch height. What is the initial velocity of launch of the boulders if air resistance is negligible? A) 44 m/s B) 1.4 m/s C) 22 m/s D) 0.69 m/s
Compared to Earth, the Moon lacks a hydrosphere, atmosphere, and a magnetosphere
Indicate whether the statement is true or false
The "redshift" of a galaxy refers to the rate
A) at which is receding. B) at which it is approaching. C) at which it is spinning. D) of its fusion.