3. A ball thrown vertically upward returns to its starting point in 4s. Find its initial speed. [4]
1 answer:
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Using the Universal Gratitation Law, we have:
Again applying the formula in the new situation, comes:
Number 4
If you notice any mistake in my english, please let me know, because i am not native.
Again applying the formula in the new situation, comes:
Number 4
If you notice any mistake in my english, please let me know, because i am not native.
Answer:
B. 0.16 m
Explanation:
The vertical distance by which the player will miss the target is equal to the vertical distance covered by the dart during its motion.
Since the dart is thrown horizontally, the initial vertical velocity is zero:
While the horizontal velocity is
The horizontal distance covered is
Since the dart moves by uniform motion along the horizontal direction, the time it takes for covering this distance is
along the vertical direction, the motion is a uniformly accelerated motion with constant downward acceleration g=9.8 m/s^2, so the vertical distance covered is given by