Question
Tom's mass is 70 kg and Sally's mass is 50.0 kg. Tom and Sally are standing 20.0 m apart on the dance floor. Sally looks up and sees Tom. She faels an attraction. Supposing that the attraction is gravitational, find its size. 292times 10^11 5.83times 10^-10 B75N 5.83times 10^-11
Solution
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(179 Votes)
Ila
Master ยท Tutor for 5 years
Answer
To find the gravitational attraction between Tom and Sally, we can use Newton's law of universal gravitation:
where:-
is the gravitational force,-
is the gravitational constant, approximately
,-
and
are the masses of the two objects (Tom and Sally),-
is the distance between the centers of the two masses.Given:-
(Tom's mass),-
(Sally's mass),-
.Substitute these values into the formula:
Rounding to three significant figures, the gravitational force is approximately:
The closest answer choice is
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