Worksheet # 2 - Velocity & Acceleration 1. Heather and Matthew take 34 min to walk eastward along a straight road to a store 2.0 Km away. What is their average velocity in m/s? 2. Mario is 75 Km due south of Carlos. If Simon rides from Carlos to Mario on his bike in 6.00 h, what is his average velocity? 3. A bus traveled south along a straight path for 3.2 h with an average velocity of 88 Km/h, stopped for 20 min, then traveled south for 2.8 h with an average velocity of 75 Km/h. a. What is the average velocity for the total trip? b. What is the displacement for the total trip? 4. The following figure shows positive graphs of the straight line movement of 2 brown bears in a wildlife preserve. Which bear has the greater average velocity over the entire period? Which bear has the greater velocity at t=10.0 min? Is the velocity of bear A always positive? Is the velocity of bear B ever negative? Bear A Bear B 3000 3000 2500 2500 E 2000 2000 2 1500 Position (m) Position (m 2 1000 2 1000 500 500 0 10 20 30 40 50 60 10 20 30 40 50 60 Time (min) Time (min) 5. A car traveling initially at 7.0 m/s accelerates to a velocity of 12.0 m/s in 2.0 s. What is the average acceleration of the car? 6. Clara's treadmill starts with a velocity of -1.2 m/s and speeds up at regular intervals during a half-hour workout. After 25 min, the treadmill has a velocity of -6.5 m/s. What is the average acceleration of the treadmill during this period? 7. With an average acceleration of -0.5 m/s, how long will it take a cyclist with an initial velocity of +13.5 m/s to a complete stop