velocity is The position-time crash of an object is shown belowtheseconds, the ple * (m) a) 10 m/s 20 b) 20 m/s 10 c) 15 m/s d) -10 m/s (s) motion diagram of a car moving along a summit road is shown below. Which position -time graph matches this motion diagram ? 8. In pursuit of a speeding truck, a police car accelerates from rest at a rate of 5 m/s for 10 s. How far will the police car travel within this 10 s.? a 50 m 25 m c) 250 m d) 500 m 9. An arrow is launched vertically upward. It moves straight up to a maximum height, then falls to the ground. Which graph best represents the vertical velocity of the arrow as a function of time? Ignore air resistance; the only force acting is gravity. (20 PP Vy Vy a ) b) C) d) 10. An arrow is shot at a target which is 8.84 m away in an angle 30 above the horizontal with an initial speed of 10 m/s. What are the vertical and the horizontal components of the initial velocity? a) Vix = 10cos(30) = 8.66 m/s, Viy = 10sin(30)= 5 m/s b Vix = 10sin(30) = 5 m/s, Viy = 10cos(30)= 8.66 m/s c) Vix = 10cos(30) = 8.84 m/s, Viy = 10sin(30)= 8.66 m/s d) Vix = 10cos(30) = 8.66 m/s, Viy = 10sin(30)=9.81 m/s