A 4.0 kg mass has a velocity of 10 m/s to the EAST. The mass undergoes a constant acceleration of 4.0 m/s² to the WEST for 3.0 sec. What is the velocity of the mass at the end of the 3.0 sec interval? A) 22 m/s to the WEST B) 2.0 m/s to the WEST C) 0.0 m/s D) 2.0 m/s to the EAST E) 22 m/s to the EAST

Question

Quizplus · Accepted Answer

Using the equation v = u + at, where u is initial velocity, a is acceleration, t is time, and v is final velocity, we can solve for the final velocity of the mass after 3.0 sec:
v = 10 m/s (initial velocity) - 4.0 m/s^2 (acceleration) x 3.0 sec
v = 10 m/s - 12 m/s
v = -2 m/s to the WEST
Therefore, the answer is B) 2.0 m/s to the WEST.

A 40 Kg Mass Has a Velocity of 10 M/s to to the EAST