At one instant an object in free fall is moving downward at 50 m/s. One second later its speed is
A) 25 m/s.
B) 50 m/s.
C) 55 m/s.
D) 60 m/s.
E) 100 m/s.
Answer: D
You might also like to view...
Transformers: The primary of an ideal transformer has 100 turns and its secondary has 200 turns. If the input voltage to the primary is 100 V, we can expect the output voltage of the secondary to be
A. 50 V. B. 100 V. C. 200 V. D. none of the given answers.
What are the two major ways in which extrasolar planets have been discovered?
A) direct imaging with large telescopes B) measuring changes in the star's brightness when a planet transits C) measuring the motion of the star due to the planets' gravitational tugs D) A and B E) A and C F) B and C
Someone hits a tether ball to make it spin around a pole. The cord that attaches the tether ball to the central pole then winds around the pole. What happens to the angular speed of the tether ball during this process?
1.It decreases. 2.It increases. 3.It remains constant. 4.It cannot be determined.
The voltage drop across a resistor is 4.0 V for a current of 1.0 A in the resistor. What is the current that will produce a voltage drop of 8.0 V across the resistor?
A. 2 A B. 1 A C. 0.50 A D. 0.33 A