Author Question: What is an inertial reference frame? It is one a. that does not accelerate. c. that accelerates at ... (Read 140 times)

fahad · **on:** Jul 28, 2018

What is an inertial reference frame? It is one
a. that does not accelerate.
c. that accelerates at a constant rate.
b. that accelerates at a varying rate.
d. in which velocities are all constant.

Question 2

A mass is suspended from a string in an airplane. As the plane is in the process of taking off, it is found that the string, instead of being vertical, hangs at an angle of 13 from the vertical. What is the acceleration of the plane at this time?
a. 2.3 m/s2
c. 9.1 m/s2
b. 3.8 m/s2
d. 3.5 m/s2