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Mila [183]
3 years ago
6

What is the speed of a car that travels 14 meters in 2 seconds?

Physics
1 answer:
mars1129 [50]3 years ago
8 0

Distance traveled by car =14m

Total time taken =2sec

Speed =distance / time

=14m/2sec

speed=7 m/sec


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When cars are equipped with flexible bumpers, they will bounce off each other during low-speed collisions, thus causing less dam
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Answer:

Explanation:

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Mass of the heavier car m_1 = 1750 kg

Mass of the lighter car m_2 = 1350 kg

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b) the change in the combined kinetic energy of the two-car system during this collision

\Delta K.E=(\frac{1}{2} m_1v_1^2+\frac{1}{2} m_2v_2^2)-(\frac{1}{2} m_1u_1^2+\frac{1}{2} m_2u_2^2)\\\\=\frac{1}{2} (m_1(v_1^2-u_1^2)+m_2(v_2^2-u_2^2))

substitute the value in the equation above

=\frac{1}{2} (1850((0.250)^2-(1.4)^2)+(1450((0.3670)^2-(-1.10)^2)\\\\=\frac{1}{2}(11850(0.0625-1.96)+(1450(0.1347)-(1.21))\\\\= \frac{1}{2}(11850(-1.8975))+(1450(-1.0753))\\\\=\frac{1}{2} (-3510.375+(-1559.185)\\\\=\frac{1}{2} (-5069.56)\\\\=-2534.78J

Hence, the change in combine kinetic energy is -2534.78J

8 0
3 years ago
What is the momentum of a 45-kg quarterback moving eastward at 15<br> m/s?
puteri [66]

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4 0
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