Question

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Answer 1

Answer:

20 m/s and 20 m is the answer derived using the formulas: v=u+at and v^2=u^2+2as.

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Answer 2

Answer:

20m/s and 20m

Explanation:

Using the equations of motion

v = u + at

where,

v = final velocity

u = initial velocity

a = Acceleration due to gravity

t = time required to reach final velocity

As per given data

t = 2 sec, g=10m/s²

A ball falls off a table implies that u=0 m/s (initially at rest)

therefore v = 0 + 10*2 = 20 m/s

Velocity of ball on reaching ground = 20 m/s

According to third equations of motion,

s = ut + 1/2 at²

s = 0 + 1/2*10(2)²

= 40/2

= 20 m

Height of table = 20 m