Tom has a mass of 66.2 kg and Sally has a mass of 51.5 kg. Tom and Sally are standing
17.2 m apart on a massless dance floor. Sally
looks up and she sees Tom. She feels an
attraction.
If the attraction is gravitation, find its mag-
nitude. Assume both can be replaced by point
masses and that the gravitational constant is
6.67259 x 10-11 N. m2/kg-.
Answer in units of N.

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

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electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j