Author Question: Two equal forces are applied to a door. The first force is applied at the midpoint of the door; the ... (Read 58 times)

evelyn o bentley · **on:** Jul 29, 2018

Two equal forces are applied to a door. The first force is applied at the midpoint of the door; the second force is applied at the doorknob. Both forces are applied perpendicular to the door. Which force exerts the greater torque?

A)

the first at the midpoint
B)

the second at the doorknob
C)

both exert equal non-zero torques
D)

both exert zero torques
E)

additional information is needed

Question 2

A 0.50-kg mass is attached to a spring of spring constant 20 N/m along a horizontal, frictionless surface. The object oscillates in simple harmonic motion and has a speed of 1.5 m/s at the equilibrium position.

(a) What is the amplitude of vibration?
(b) At what location are the kinetic energy and the potential energy the same?