physics question

5 A roller coaster passes point A with a speed of 20 m/'s, Assuming no friction on the track, (1) find the speed of the roller coaster at points B and C. C! (2) If there is friction and the average friction equals to 30m one-sixth of it's weight, with what speed will it reach point 10m 87 The distance traveled between A and B is 60 m. 1.20 + D E - Ext Ep = =myst mah= constant 1/ 2 Speed of the roller coaster at points B and same as bo . (27 - $5 = ( mah + + my ? ) - ( man, + - my. ) 10 A=BEC. Do 8 120: 45 /1 - 2 (4) On the axes below, sketch the acceleration a versus time t graph for the motion of the cart from 1=0 to 1=25s [m/s=) 1,0 0.6 0.4 0.2 -0.2 -0.4 -0.6 -0.8 - 1.0 (5) For what time(s) is the acceleration of the object greatest? is the (6) For each section, find the net force acted to the cart. 4 5 4 (7) From 1= 25 s until the cart reaches the end of the track, the cart continues with constant horizontal velocity. The cart leaves the end of the track and hits the floor, which is 0.10 m below the track. Neglecting air resistance, determine each of the following: i. The time from when the cart leaves the track until it first hits the floor. ii, The horizontal distance from the end of the track to the point at which the cart first hits the floor. = vo+at WE ion change this formed to Va = C-V. A - D V = * = 25 So Vo= :5 m /s in s = vet that