Energy Conservation with Conservative Forces: a Projectile Is Fired from Ground

question 41

Multiple Choice

Energy conservation with conservative forces: A projectile is fired from ground level at an angle of 40.0° above horizontal at a speed of 30.0 m/s. What is the speed of the projectile when it has reached a height equal to 50.0% of its maximum height?

• A) 26.0 m/s
• B) 27.4 m/s
• C) 28.7 m/s
• D) 26.7 m/s
• E) 28.1 m/s

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