3 years ago

A car is going 43m/s and travels 14 m, how long did it take?

Physics

1 answer:

Burka [1]3 years ago

6 0

Answer:

Time = 0.3256 sec

Explanation:

Velocity = displacement / time

43=14/t

So the time =14/43

t=0.3256 sec

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A spring with k = 53 N/m hangs vertically next to a ruler. The end of the spring is next to the 18 cm mark on the ruler. If a 2.

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1.07 m

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P = Kinetic energy

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At the lowest point of the mass the energy conservation is as follows

$P_{ig}+P_{is}+K_i=P_{fg}+P_{fs}+K_f\\\Rightarrow mgx+0+0=mgx+\frac{1}{2}kx^2\\\Rightarrow x=\frac{2mg}{k}\\\Rightarrow x=\frac{2\times 2.4\times 9.81}{53}\\\Rightarrow x=0.89\ m$

At its lowest position the mark on the ruler will be

$x_f=0.18+0.89\\\Rightarrow x_f=1.07\ m$

The spring line will end up at 1.07 m

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