A stunt driver leaps off a bridge 50 m above a river with an initial upward velocity of 10 m/s. Her altitude is given by h = -5t^2+10t+50, where t is in seconds and h is in meters.

a) Construct a table of values to illustrate her height in 1-second intervals until she hits the water
b) What does a negative value for height represent?
c) Construct a table showing her average velocity during 1-second intervals starting at time 0
d) When does her velocity change from positive to negative?
e) What does this change represent?
f) When does she hit the water?

Question

A stunt driver leaps off a bridge 50 m above a river with an initial upward velocity of 10 m/s. Her altitude is given by h = -5t^2+10t+50, where t is in seconds and h is in meters.

a) Construct a table of values to illustrate her height in 1-second intervals until she hits the water
b) What does a negative value for height represent?
c) Construct a table showing her average velocity during 1-second intervals starting at time 0
d) When does her velocity change from positive to negative?
e) What does this change represent?
f) When does she hit the water?

anonymous · Answer

g) what is her average speed in the half-second before she hits the river?
h) why is her average speed from t=0 to t=2 equal to 0?
i) how would you find the true average speed between t=0 and t=2 seconds?


THANKSS IN ADVANCE!

anonymous · Answer

Have you done part a?

anonymous · Answer

part a is done

anonymous · Answer

Really, you should give more details with a long multi-part question like this about what you've done and where precisely you are stuck. Nobody is just going to work through all of these.

anonymous · Answer

my fault. All i have completed is a +b