Homework Help: Calc

Posted by Katrina on Monday, October 17, 2011 at 4:38pm.

If a rock is thrown upward on the planet Mars with a velocity of 17 m/s, its height (in meters) after t seconds is given by H = 17t − 1.86t^2.

(a) Find the velocity of the rock after one second.
(b) Find the velocity of the rock when t = a.
(c) When will the rock hit the surface? (Round your answer to one decimal place.)
(d) With what velocity will the rock hit the surface?

Calc - Steve, Monday, October 17, 2011 at 4:58pm
As on earth, v = Vo - at where a = 1.86*2 on Mars.

So, v = 17 - 3.72t

v(1) = 17-3.72 = 13.28m/s
v(a) = 17 - 3.72a

Since h = t(17-1.86t)

h=0 when t = 0 (rock thrown)
and t = 9.14 (rock hits again)

The rock will hit the surface with the same speed it had when it left: 17m/s. However, as a velocity, it's falling, so v = -17m/s

Answer this Question

Related Questions

Calculus - If a rock is thrown upward on the planet Mars with a velocity of 14 m...
Calculus - f a rock is thrown upward on the planet Mars with a velocity of 7 m/s...
calculus - If a rock is thrown upward on the planet Mars with a velocity of 13 m...
Calculus - If a rock is thrown upward on the planet Mars with a velocity of 7 m/...
math - If a rock is thrown upward on the planet Mercury with a velocity of 11 m/...
math - If a rock is thrown upward on the planet Mercury with a velocity of 11 m/...
Calculus - If a rock is thrown upward on the planet Mars with a velocity of 10 m...
Physics - A rock is thrown vertically upward with a speed of 11.0 from the roof ...
physics - Consider a rock that is thrown off a bridge of height 27 m at an angle...
physics - A rock is thrown vertically upward from the ground with an initial ...

For Further Reading

First Name:
School Subject:
Answer: