5. A billiard ball rolls from rest down a smooth ramp that is 8.0 m longe The acceleration of . the ball is constant at 2.0mn s. a. What is the speed of the ball when it is halfway down the ramp? (2 marks) b. What is the final speed of the ball? I marks) c. How long does the ball take to roll the first 4.0 m? (2 marks)

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.

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It equals just about 6,300 km per hour each day an week

Which of the following are risk factors for emphysema ? correct answer : a and and c          good luck and have a nice benevolentpuppy day! : )