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Gelneren [198K]
3 years ago
8

A 7.0 kg bowling ball traveling at 2.0 m/s collides with a stationary 0.5 kg beach ball in

Physics
1 answer:
vovangra [49]3 years ago
5 0

Answer:

D 7.0 m/s

Explanation:

MU+mu=MV+mv

7×2+0.5×0 =7×1.5+0.5×v

14+0=10.5+0.5v

14-10.5= 0.5v

3.5=0.5v

0.5v0.5 =3.5/0.5

v= 7m/s

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car was moving in a straight road of length 320 km it covered 240 km with an average velocity 75 km/hr then it ran out of fuel a
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The average velocity of the car for the whole journey is 69.57 km/h.

The given parameters:

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t = \frac{d}{v} \\\\t_1 = \frac{240}{75} \\\\t_1 = 3.2 \ hours

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t = t_1 + t_2 + t_3\\\\t = 3.2 \ hr \ + \ 0.6 \ hr \ + \ 0.8 \ hr\\\\t = 4.6 \ hours

The average velocity of the car for the whole journey is calculated as follows;

v = \frac{total \ distance }{total \ time} \\\\v = \frac{320}{4.6} \\\\v = 69.57 \ km/h

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