Case study
A ball is thrown upward from a rooftop, 80m above the ground. It will reach maximum vertical height and then fall back to the ground. The height of the ball from the ground at time t is h and is given by h = -16t2 + 64t + 80, then give the answer of the following questions.
i- The height reached by the ball after 1 second is :
(a) 128m (b) 208m (c) 98m (d) None of these
ii- The time it will take before hitting the ground is
(a) 6 sec (b) 1sec (c) 5sec (d) None of these
iii- The maximum height reached by the ball is:
(a) 240m (b) 144m (c) 200m (d)None of these
iv- If we draw the graph of the given equation then the shape of the graph will be:
(a) A straight line (b) A closed polygon (c) parabola (d) None of these
v- The value of discriminant for the given equations is
(a) 9216 (b)8216 (c)6129 (d) None of these
Answers
Step-by-step explanation:
Case study
A ball is thrown upward from a rooftop, 80m above the ground. It will reach maximum vertical height and then fall back to the ground. The height of the ball from the ground at time t is h and is given by h = -16t2 + 64t + 80, then give the answer of the following questions.
i- The height reached by the ball after 1 second is :
(a) 128m (b) 208m (c) 98m (d) None of these
ii- The time it will take before hitting the ground is
(a) 6 sec (b) 1sec (c) 5sec (d) None of these
iii- The maximum height reached by the ball is:
(a) 240m (b) 144m (c) 200m (d)None of these
iv- If we draw the graph of the given equation then the shape of the graph will be:
(a) A straight line (b) A closed polygon (c) parabola (d) None of these
v- The value of discriminant for the given equations is
(a) 9216 (b)8216 (c)6129 (d) None of these
Answer:
1->a
2b
3a
4d
5c
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