Question

1 how fast must a ball be rolled along a 70-cm-high table so that when it rolls off the edge it will strike the floor at this same distance (70 cm) from the point directly below the table edge?

Answer 1

A ball must be fast rolled is 185.2cm/sec, according to the question.

What do you mean by distance?

Distance is the sum of an object's movements, regardless of direction. Distance can be defined as the amount of space an object has covered, regardless of its starting or ending position.

According to the given question,

We have the given information:

Table height = h = 70cm

Distance = s = 70cm

g = 9.8$ms^{-1}$

Now, we have to find the time of falling,

$t=\sqrt{\frac{2h}{g} }=0.378c$

Horizontal velocity,

$v=\frac{s}{t}=\frac{70cm}{0.378s}=185.2cm/s$

Therefore, the required answer is 185.2cm/sec.

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