Rank the time intervals from least to greatest that are required to stop the following objects using the associated constant forces: (1)A 0.140-kg baseball travelling at 43 m/s using a force of 150 N,(2)A 0.185-kg softball travelling at 35 m/s using a force of 190 N,(3)A 0.162-kg cricket ball travelling at 38 m/s using a force of 170 N,and finally (4)a 0.127-kg hockey puck travelling at 47 m/s using a force of 145 N.
A)1,2,3,4
B)4,1,3,2
C)2,3,1,4
D)3,4,2,1

Question

Quizplus · Accepted Answer

The time intervals required to stop an object are dependent on its mass, initial velocity, and the force being applied. Using the formula t = mv/F, where m is mass, v is velocity, and F is force, we can calculate the time intervals for each object. 
For the baseball: t = (0.140 kg x 43 m/s)/150 N = 0.0404 s
For the softball: t = (0.185 kg x 35 m/s)/190 N = 0.0341 s
For the cricket ball: t = (0.162 kg x 38 m/s)/170 N = 0.0362 s
For the hockey puck: t = (0.127 kg x 47 m/s)/145 N = 0.0413 s
Thus, the intervals from least to greatest are: softball, cricket ball, baseball, hockey puck. Choice C correctly reflects this order.

Rank the Time Intervals from Least to Greatest That Are