Physics, 01.02.2021 08:10, ketnerfaith17

3. The change in altitude of an object falling under gravity is determined by finding the product of -9.75 and the square of the time of the fall, then dividing by 2. Write an equation for the change in altitude, then determine the change in altitude in meters of an object that has fallen for 4 seconds. Recall: Product refers to multiplication.

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answered: Guest

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answered: Guest

unbalanced force

explanation:

answered: Guest

This is what a calorimeter is used for simpler ex, to measure calories in food.

answered: Guest

Initial velocity, u = 4.9 m/sfinal velocity = v m/sinitial height, h₁ = 245 m final height, h₂ = 0a = -9.8 m/s²time taken = t secondss = ut + 0.5at²⇒ (h₂-h₁) = ut + 0.5at²⇒ 0-245 = 4.9t + 0.5×(-9.8)×t²⇒ -245 = 4.9t - 4.9t²⇒ 4.9t² -4.9t -245 =0solving it, we get t = 7.59sv = u + at = 4.9 -9.8×7.59 = 4.9 - 74.38 = -69.48 m/svelocity is 69.48 m/s downward

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3. The change in altitude of an object falling under gravity is determined by finding the product of...