You run at a constant speed of v = 6 mph. For the next 20 yards, you speed up with an acceleration of a = 2.5 ft/s2 a) What is your speed in m/s at the end of your sprint? b) How much time did it take to perform the sprint?

Superman needs to save Lois from the clutches of Lex Luthor. After flying for 12 seconds, he is 1900 meters from her. Then at 18 seconds he is 1600 meters from her. What is Superman's average speed? meters per second m/s How far from Lois did Superman start? meters Write an equation to model this situation (used for distance from Lois in meters and s for seconds).

3. Irina dives from a 25-meter high platform into a water (see diagram ). 25 m a. Irina's acceleration as she is falling from the platform. What hypothesis(s) must you make in order to state this value as the acceleration? Explain. c. Use kinematic equations to fill in the table below. Time (s) Velocity (m/s) Fallen Distance ( m) Height (m) 25 0.5 1.0 1.5 2.0

Starting from rest, a car experiences an acceleration, a, causing it to start moving. It reaches itsfinal velocity, v, after accelerating for a time At.A second car that also starts from rest experiences the same acceleration for twice as much timeas the first. What is the second car's final velocity? a) vb) 1/2vc) 2vd) 1/4ve) 4v What is 90 km/hr expressed in m/s?a 25 m/sb) 324 m/sc) 1.5 m/sd) 15 m/s