A 1-kg ball is thrown straight up at 10 m/s. Neglecting air resistance, the net force that acts on the ball when it is halfway to the top of its path is

A) 1/2 N.
B) 1 N.
C) 5 N.
D) 7.5 N.
E) 10 N.


Answer: E

Physics & Space Science

You might also like to view...

Which of these did Pierre and Marie Curie discover about radioactivity?

a. Uranium is the only radioactive element. b. Several other elements are radioactive, some more so than uranium. c. The radiation from radioactive isotopes is a specific form of X rays. d. The radiation from radioactive isotopes includes positrons. e. The amount of radiation depends on the salt the uranium is combined with.

Physics & Space Science

By what factor should the length of simple pendulum be changed in order to triple the period of vibrations?

a. 3 b. 6 c. 9 d. 1/3

Physics & Space Science

A series LR circuit includes a 9.0 V battery, a resistance of 0.50 and an inductance of 0.80 H. What is the current 2.0 s after the switch is closed?

A. 18 A B. 13 A C. 6.4 A D. 5.2 A E. 4.3 A

Physics & Space Science

If the distance to the nearest star is 4.2 light-years, then

a. the star is 4.2 million AU away. b. the light we see left the star 4.2 years ago. c. the star must have formed 4.2 billion years ago. d. the star must be very young. e. the star must be very old.

Physics & Space Science