Calculate the centripetal force of a ball on a string in circular motion if the mass is 7 kg traveling at 3 m/s and the radius of the string is 4 meters.
0 11 N
0 14 N
0 16 N
0 25 N

F = 16 N

Explanation:

Given that,

Mass of the ball, m = 7 kg

Speed of the ball in circular motion, v = 3 m/s

The radius of the string, r = 4 m

We need to find the centripetal force of a ball on a string in circular motion. The formula for the centripetal force is given by :

Putting all the values in the above formula

or

F = 16 N

Hence, the correct option is (c).

because if the tool that you are using is not balanced it there would be false mass.

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