Falling objects drop with an average acceleration of 9.8 m/sec/sec. if an object falls from a tall building, how long will it take before it reaches a speed of 49 m/sec?

The answer for this is 5 seconds.

Here's an explanation:

The average acceleration as an object falls in 9.8m/second. The question is asking how long it will take before the acceleration is 49m/second. Since it's 9.8m/second, then you'll have to divide 49 by 9.8 to find the answer. The quotient of this is 5, so that's your answer.

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

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step-by-step explanation: