. The figure to the right shows the velocity of an Ux (m/s) object as a function of time. (a) Compute the average acceleration during the 60 following time intervals: 50 i) t=0 to t = 15 s 40 (i) t= 15 to t = 25 s 30 iii) t= 25 to t = 35 s 20 10 - - 1 (s) (iv) t= 35 to t = 40 s 0 5 10 15 20 25 30 35 40 (b)What is the instantaneous acceleration at: -10- (i) t = 10 -201 (ii) t = 20 -30 -40 (iii) t = 30 -50 (c) Indicate all times where the object is at rest? 60 (d) Indicate all time intervals where the object is speeding up: (e) Indicate all time intervals where the object is slowing down: (c) What are the displacements and distances for all of the following time intervals: (i) t= 0 to t = 10 s (ii) t= 10 to t = 20 s (iii) t= 20 to t = 30 s (iv) t= 30 to t = 40 s (v) t= 0 to t = 40 sa(m/s-): On the axes below, sketch the acceleration a versus time t graph for the motion of the cart from t = 0 to t = 40 s. (s) Osis 2 s 3 5 4 s 5 s Om 4m 16m 36 m 64 m 100 m 3 . The motion diagram above presents the position and elapsed time of a bike that starts from rest and accelerates at a constant rate. a. What is the average velocity of the bike during first 5 s? i= o AX=20 Vo_ = AX 100 = 20 m /s "f = 20 V = ve+ vi 5 + = 65 2 b. What is the acceleration of the bike? if vi = o AX = vit + + at ? 2/4 = ta V = VE Color fi bib amil bunt 2 100 = 19. 52 2VEVE 8 = a c. What is the velocity of the bike at =3s Vf = vit at C = 0 + 8 ( 3 ) = / 24 m /S