Question

Leyla drops a penny from a height of 150 m. How long will it take the penny to hit the ground? Use the formula h(t)=−4.9t2+vot+ho , where vo is the initial velocity and ho is the initial height. Round to the nearest tenth of a second. Enter your answer in the box.

Answer 1

the answer is 5.5 bc i just took the test for anyone else

Answer 2

Answer:

Therefore, The penny will take 5.5 seconds to hit the ground

Step-by-step explanation:

Leyla drops a penny from a height of 150 m

⇒ Initial height, h0 = 150 m

Initial velocity = 0 m/second

Also, when the penny hit the ground the height will be 0

⇒ h(t) = 0 m

$\text{Now, h(t) = }-4.9t^2+v_0t+h_0}\\\\\implies 0=-4.9t^2+0 +150\\\\\implies -4.9t^2=-150\\\\\implies t^2=\sqrt{\frac{150}{4.9}} \\\\\implies t=5.5$

Therefore, The penny will take 5.5 seconds to hit the ground