The speed of an object, one second after it has been dropped on the planet, is 8 m/s. What will be it's speed after its speed after 3 seconds when it was first dropped?
Answer: 24 m/s
Explanation
Given the object's speed is 8 m/s after 1 second, we can determine the acceleration due to gravity on this planet is 8 m/s², since it starts from rest (0 m/s).
To find the speed after 3 seconds, we use the formula: speed = initial speed + acceleration × time
Initial speed = 0 m/s (since it's dropped)
Acceleration = 8 m/s²
Time = 3 seconds
Speed after 3 seconds = 0 + 8 × 3 = 24 m/s
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