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zvonat [6]
3 years ago
14

An object has 16N of force being applied to the right, 16N of force being applied to the left, and 4N of force being applied dow

nward. What is the net force on the object?
Physics
1 answer:
goldenfox [79]3 years ago
6 0

Answer:

4N downward

Explanation:

the 16N left and right cancel each other out, so you are left with the 4N downward.

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Here in this case we can use work energy theorem

As per work energy theorem

Work done by all forces = Change in kinetic Energy of the object

Total kinetic energy of the solid sphere is ZERO initially as it is given at rest.

Final total kinetic energy is sum of rotational kinetic energy and translational kinetic energy

KE = \frac{1}{2}Iw^2 +\frac{1}{2} mv^2

also we know that

I = \frac{2}{5}mR^2

w= \frac{v}{R}

Now kinetic energy is given by

KE = \frac{1}{2}(\frac{2}{5}mR^2)w^2 +\frac{1}{2} m(Rw)^2

KE = \frac{1}{5}mR^2w^2 +\frac{1}{2} mR^2w^2

KE = \frac{7}{10}mR^2w^2

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