If you push directly on the handle of a closed door and it does not swing open, then

A. the net torque on the door must be zero.
B. the lever arm must be very small.
C. its rotational inertia must be much larger than your torque.
D. the angular momentum of the door is larger than your force.


Answer: A

Physics & Space Science

You might also like to view...

Draw the octahedral shape with the atoms shown that surrounds the interstitial site at ½, ½, ½ in the FCC metal structure.

What will be an ideal response?

Physics & Space Science

Which of the following is TRUE?

A) Visible light makes up the greatest part of the electromagnetic spectrum. B) In a vacuum, electromagnetic waves all travel at the same speed, the speed of light. C) Ultraviolet light has the shortest wavelength of any electromagnetic wave. D) A blackbody emits all its radiation at a single wavelength or frequency. E) Electromagnetic waves cannot travel through empty space.

Physics & Space Science

For all paths of Earth satellites, one focus of the path is

A) the location from which the satellite was launched. B) Earth's center. C) the Sun's center. D) need more information

Physics & Space Science

A 360-g metal container, insulated on the outside, holds 180.0 g of water in thermal equilibrium at 22.0°C. A 24.0-g ice cube, at the melting point, is dropped into the water,

and when thermal equilibrium is reached the temperature is 15.0°C. Assume there is no thermal energy exchange with the surroundings. For water, the specific heat is 4190 J/kg ? K and the heat of fusion is 3.34 × 105 J/kg. What is the specific heat of the metal of the container? A) 1700 J/kg ? K B) 970 J/kg ? K C) 2300 J/kg ? K D) 2800 J/kg ? K E) 3300 J/kg ? K

Physics & Space Science