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JulsSmile [24]
2 years ago
5

If a force of 30N is applied to an object of mass 8kg which is kept on a surface, it achieves an acceleration of 3m/s. What is t

he frictional force in Newton between the object and the surface?
a) 0
b) 6
c) 24
d) 54
​
Physics
1 answer:
Eduardwww [97]2 years ago
3 0

By Newton's second law, the net force on the object acting parallel to the surface is

∑ F = F[applied] - F[friction] = (8k g) (3 m/s²)

If F[applied] = 30 N, then

30 N - F[friction] = 24 N   ⇒   F[friction] = 6 N

so the answer is B.

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The magnitude of the average impulsive force imparted to the ball if it is in contact with the bat is 6000 N

The mass of the baseball, m = 0.15 kg

The speed at which it moves, v = 30 m/s

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The impulsive force is given by the formula:

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