Multiple Choice
John throws a rock down with speed 14 m/s from the top of a 30-m tower.If g = 9.8 m/s2 and air resistance is negligible,what is the rock's speed just as it hits the ground?
A) 12 m/s
B) 28 m/s
C) 350 m/s
D) 784 m/s
Correct Answer:
Verified
Correct Answer:
Verified
Related Questions
Q1: A bird,accelerating from rest at a constant
Q5: The value of an object's acceleration may
Q6: Consider the magnitude of the average speed,
Q8: A baseball catcher throws a ball vertically
Q9: A strobe photograph of a car moving
Q10: A strobe photograph shows equally-spaced images of
Q14: An object is dropped from a height.Once
Q44: The distance of the Earth from the
Q49: A ball of relatively low density is
Q51: Jeff throws a ball straight up.For which