Question

→XCIO D Question 11 7.5 pts An object moves in the x direction only under a constant acceleration. It's acceleration is 3 m/s in the *x direction. It is originally moving at 14 m/s in the direction. How long does it take in seconds, to travel a displacement of 22 m in the ex direction? Hint: Find the velocity at this displacement similar to the last question, first. Question 12 7.5 pts Car 1 is at rest at a traffic light. When the light turns, it applies a constant of acceleration of 3 m/s in the direction. Car2 is 61 m ahead of car 1 (in the+x direction) when it starts to accelerate, initially Car 2 is moving a constant velocity in the direction. What is the magnitude or amount of the velocity of car 2. in m/s, such that both cars pass one another are at the same position on different lanes) after car 1 has been traveling for 4 seconds? Question 13 7.5 pts

Answer 1

Initial relocity, u = 14 m/s (-o) u sa Х d. 22 ch Accelesation, å = 30/2ch) Displacement in to anis, IF, & be the time time needed a= udt fad. then

22 = -14% +x3x 1.54² - 147 22 = on, 14 - 142 + 4xl-5x22. 2x1.5 to? 14 | 18-11 + 10.7 see . ( taking only as - leads to unphysical ansves) / 12% Carl, Initially at sest u=0 m/s. have constant accelesation, å= sonst (+) .di dr. a d. So, In t=4 see, it has travelled, di= tath 24 m ge: £x 3x4² OD dia Initial distance with cas 2 da 6lm, 2 So, in tsarels distance t=4 see, de = (drd.) 61-24 on, de 37 m. If I be the constant velocity of car 2 then de t = 9-25 m/s, 4. So, TO 1) 9.25 mm/s () 1