In an effort to loosen the bolt on the wheel of a car, a man with a mass of 70 kg steps on the end of a 50-cm tire iron which is extending horizontally from the bolt. How much torque is he applying to the bolt?
A)
340 N m
B)
14 N m
C)
140 N m
D)
70 N m
E)
35 N m
A
You might also like to view...
The process of convection occurs in
A) solids. B) liquids. C) gases. D) fluids. E) none of the above
A parallel-plate capacitor has a plate separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field between the plates?
A) 100 N/C upward B) 100 N/C downward C) 4000 N/C downward D) 40000 N/C upward E) 40000 N/C downward
About how big is an atom?
a. too small to measure b. about a millionth of a meter across c. about a billionth of a meter across d. about a trillionth of a meter across e. none of the above
Superconductivity is destroyed in by a high magnetic field because the magnetic field
(a) Heats the superconductor. (b) Induces current in the superconductor. (c) Rotates Cooper pair electron spins into the same direction. (d) Alters the orbits of electrons on the atoms.