Read each scenario and then answer the question. Scenario A: A 6-kg bucket is raised a distance of 6 m. Scenario B: A 9-kg bucke
t is raised a distance of 5 m. Scenario C: A 12-kg bucket is raised a distance of 4 m. Scenario D: A 15-kg bucket is raised a distance of 3 m. Which scenario generates the most gravitational potential energy?
2 answers:
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Answer:
4.15 m/s
Explanation:
Its given that acceleration is 0.1 m/s² with a direction opposite to the velocity. Since, the direction of acceleration is opposite to the velocity, this gives us a hint that the velocity is decreasing and so acceleration would be negative.
i.e.
acceleration = a = - 0.1 m/s²
Distance covered = S = 6m
Velocity after covering 6 meters = Final velocity = = 4 m/s
We need to find the initial speed, which will be the same as the magnitude of initial velocity.
Initial velocity = = ?
3rd equation of motion relates the acceleration, distance, final velocity and initial velocity as:
Using the known values in the formula, we get:
Thus, the initial speed of the ball was 4.15 m/s