At one instant a heavy object in air is moving upward at 50 meters per second. One second later its speed in meters per second is approximately
A) 55 m/s.
B) 40 m/s.
C) 60 m/s.
D) 50 m/s.

Question

Quizplus · Accepted Answer

The object will slow down due to gravity, which accelerates it downward at approximately 9.8 m/s^2. After one second, its speed will be approximately 50 m/s - 9.8 m/s = 40.2 m/s, which is closest to option B, 40 m/s.

At One Instant a Heavy Object in Air Is Moving