Question

A ball is released from rest from the twentieth floor of a building. After 1 s, the ball has fallen one floor such that it is directly outside the nineteenth-floor window. The floors are evenly spaced. Assume air resistance is negligible. What is the number of floors the ball would fall in 3s after it is released from the twentieth floor?

a. 3 floors or less
b. 4 to 6 floors
c. 7 to 10 floors
d. 11 floors or more

Answer 1

The ball would fall 3 floors or less in 3 seconds after being released from the twentieth floor. Hence the correct answer is option A

Step-by-step explanation:

To find the number of floors the ball would fall in 3 seconds after being released, we can first calculate how many floors the ball falls in 1 second. Since the ball falls one floor in 1 second, we know it falls 1/1 = 1 floor per second. Therefore, in 3 seconds, the ball would fall 3 floors.

The number of floors the ball would fall in 3s after being released from the twentieth floor is 3 floors or less.

Hence the correct answer is option A