Limh 0 fh g a

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lim_(h->0) f(h) = (g) A time t>1 when the positron's instantaneous velocity is zero is (h) Where is the positron located at the time you found in (g) 7. 12/12 points | Previous Answers The location P(t) of an object moving in the xy -plane at time t seconds is given by the equations P(t)= (x(t),y(t)) , where x(t)=a + 9 t and y(t)=b + 8 t , a,b are constants and distances are measured in units of meters. The equations x(t), y(t) describe linear parametrized motion ; see section 10.1 of the textbook for review. (a) The location of the object at time t=1 is ( ) (b) The average rate of change of x(t) between 1 and 2 seconds is m/s; this is called the average velocity of x(t) on the time interval [1,2]. (c) The instantaneous rate of change of x(t) at time t=1 is m/s; this is called the instantaneous horizontal velocity at time t=1 (d) What is the instantaneous horizontal velocity of the object at time t (e) The average rate of change of y(t) between 1 and 2 seconds is m/s; this is called the average velocity of y(t) on the time interval [1,2]. (f) The instantaneous rate of change of y(t) at time t=1 is m/s; this is called the instantaneous vertical velocity at time t=1 (g) What is the instantaneous vertical velocity of the object at time t , . ? . ?
2/21/14, 2:38 PM Chapter 2.7 HW, Part 2 Page 9 of 11 (h) The line along which the object is moving in the plane has the equation: y= x + (i) Let d(t) be the distance the object has traveled after t seconds. The formula for d(t) . is . (j) The instantaneous rate of change of d(t) at time t is . This is called the speed along the line of motion.
2/21/14, 2:38 PM Chapter 2.7 HW, Part 2 Page 10 of 11

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