Velocity functions A projectile is fired vertically upward into the air, and its position (in feet) above the ground after t seconds is given by the function s ( t ) . a. For the following functions s ( t ), find the instantaneous velocity function v ( t ). (Recall that the velocity function v is the derivative of the position function s .) b. Determine the instantaneous velocity of the projectile at t = 1 and t = 2 seconds. 31. s ( t ) = − 16 t 2 + 100 t
Velocity functions A projectile is fired vertically upward into the air, and its position (in feet) above the ground after t seconds is given by the function s ( t ) . a. For the following functions s ( t ), find the instantaneous velocity function v ( t ). (Recall that the velocity function v is the derivative of the position function s .) b. Determine the instantaneous velocity of the projectile at t = 1 and t = 2 seconds. 31. s ( t ) = − 16 t 2 + 100 t
Velocity functions A projectile is fired vertically upward into the air, and its position (in feet) above the ground after t seconds is given by the function s(t).
a. For the following functions s(t), find the instantaneous velocity function v(t). (Recall that the velocity function v is the derivative of the position function s.)
b. Determine the instantaneous velocity of the projectile at t = 1 and t = 2 seconds.
3. (i) Using the definition of the line integral of a vector field, calculate the
line integral
L³
F.dy
of the vector field F: R² → R² given by
F(x, y) = (y, x),
and where the curve & is the unit semi-circle centred at the origin, located in
the upper half-plane and oriented in the anticlockwise direction.
Hint. Represent the curve y as the join of two curves y = 71 + 1/2 (see Example 8.9
in the Notes).
[20 Marks]
(ii) Calculate the same integral using Green's Theorem.
[10 Marks]
1. Evaluate the integral
↓ f(x, y)dxdy,
of function f R² →R over the domain DC R2, where:
f(x, y) = 2x + y
and D is the is the triangle with vertices (0, -1), (1,0) and (0,2).
Hint. Represent D in the form D = {(x, y) = R² : x = (a, b), g(x) < y < h(x)} for
some a
2. (i) Describe with a sketch the trace of the following curve in R²
(t) = (t² sin(t), t2 cos(t)),
(€ -2,2]).
[15 Marks]
(ii) Find the length of this curve.
[25 Marks]
Chapter 3 Solutions
MyLab Math with Pearson eText -- Standalone Access Card -- for Calculus: Early Transcendentals (3rd Edition)
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, calculus and related others by exploring similar questions and additional content below.