chl75
12.03.2020 •
Mathematics
An object is launched at 9.8 meters per second from 73.5 meter tall platform. The objects height s (in meters) after t seconds I’d given by the equation s(t)= -4.9t2-9.8+73.5. Use the factoring to determine when the object hits the ground
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Ответ:
The object hits the ground in 5 seconds.
Step-by-step explanation:
Given : An object is launched at 9.8 meters per second from 73.5 meter tall platform. The objects height s (in meters) after t seconds I’d given by the equation .
To find : Use the factoring to determine when the object hits the ground ?
Solution :
When the object hits the ground the distance is zero.
i.e. s(t)=0
So,
Applying quadratic formula,
Here, a=-4.9, b=-9.8 and c=73.5
Reject t=-3
Therefore, the object hits the ground in 5 seconds.
Ответ:
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