Author Question: Velma is in a train moving eastward at 20 m/s. She throws a ball toward the rear of the train, ... (Read 129 times)

sc00by25 · **on:** Jul 29, 2018

Velma is in a train moving eastward at 20 m/s. She throws a ball toward the rear of the train, throwing it at her normal throwing speed of 20 m/s. What is Mort's observation, regarding the ball?

A) It moves westward at 20 m/s.
B) It moves eastward at the same speed of the train, just keeping up with the train.
C) It moves westward at 40 m/s.
D) It moves eastward at 40 m/s.
E) It falls straight down.

Question 2

Two simple pendulums, A and B, are each 3.0 m long, and the period of pendulum A is T. Pendulum A is twice as heavy as pendulum B. What is the period of pendulum B?

A) 2T B) T/2 C) T/ D) T E) T