Question

A student releases a marble from the top of a ramp. The marble increases speed steadily and travels 220cm in 4.20s.

What was the marble's final speed (in given units)?

Answer 1

Step-by-step explanation:

d = ½at²

220 = ½a4.20²

a = 24.943310... cm/s²

v = at

v = 24.943310(4.20)

v = 104.7619047...

v = 105 cm/s

or

s = ½(0 + v)t

v = 2s/t

v = 2(220)/4.2

v = 104.7619047...

v = 105 cm/s