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The velocity π£ of an object in metres per second is directly proportional to the time π‘ in seconds.
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This relationship can be expressed in the equation π£ equals 9.8π‘.
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Find the value of π‘ when π£ equals 637 metres per second.
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So hereβs our equation.
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And weβre to find the value of π‘ when π£ is 637 metres per second.
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So we can replace π£ with 637.
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And now we can solve for π‘.
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So we need to divide both sides by 9.8.
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So 65 is equal to π‘.
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Therefore, when the velocity is equal to 637 metres per second, the time is 65 seconds.