When you stand at rest on a floor, the number of vertical forces acting on you is
A. Zero
B. One
C. Two
D. Three
E. Four
Answer: C. Two
You might also like to view...
One type of event that may generate gravity waves of sufficient strength to be detected with current equipment is the death spiral of a neutron star as it plunges into a black hole
Indicate whether the statement is true or false
The vibrational frequency of an HF molecule is 8.72 × 1013 Hz and the reduced mass of the molecule is 1.589 × 10-27 kg
What is the ground state vibrational energy of an HF molecule? (1 eV = 1.60 × 10-19 J, h = 1.055 × 10-34 J ? s, h = 6.626 × 10-34 J ? s) A) 0.30 eV B) 0.18 eV C) 0.12 eV D) 0.36 eV E) 0.24 eV
Charge of uniform density (80 nC/m3) is distributed throughout a hollow cylindrical region formed by two coaxial cylindrical surfaces of radii 1.0 mm and 3.0 mm. Determine the magnitude of the electric field at a point which is 2.0 mm from the symmetry axis
a. 7.9 N/C b. 9.0 N/C c. 5.9 N/C d. 6.8 N/C e. 18 N/C
Book is placed on a chair. Then a videocassette is placed on the book. The floor exerts a normal force
a. on all three. b. only on the book. c. only on the chair. d. upwards on the chair and downwards on the book. e. only on the objects that you have defined to be part of the system.