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jenyasd209 [6]
3 years ago
12

A horse has an acceleration of 2 m/s2. If it starts from rest, how fast is it going after 1.7 seconds?

Physics
2 answers:
fgiga [73]3 years ago
6 0

       (2  m/s²)  ·  (1.7  s)  =  3.4 m/s
ladessa [460]3 years ago
3 0

1.17m/s2

I believe, you subtract 2-0 on top and 1.7-0 on the bottom and get 2/1.7 which is 1.17

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A 2800 kg truck moving at 12 m/s to the right hits a stopped 1100 kg car. What is the combined velocity the moment they stick to
leva [86]

Answer:

The combined velocity is 8.61 m/s.

Explanation:

Given that,

The mass of a truck, m = 2800 kg

Initial speed of truck, u = 12 m/s

The mass of a car, m' = 1100 kg

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We need to find the combined velocity the moment they stick together. Let it is V. Using the conservation of momentum.

m_1v_1+m_2v_2=(m_1+m_2)V\\\\V=\dfrac{m_1v_1+m_2v_2}{(m_1+m_2)}\\\\V=\dfrac{2800\times 12+0}{2800+1100}\\\\V=8.61\ m/s

So, the combined velocity is 8.61 m/s.

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Using work-change in kinetic energy theorem

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d = 15.7 m

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