Multiple Choice
A 20 kg uniform door has a width of 1.2 m and a height of 2.5 m. The door is mounted on a post by a pair of hinges, marked 1 and 2, at the top and bottom of the door. An external force of 60 N, at an angle of 30° above the horizontal, is applied to the doorknob, as shown. The doorknob is 1.0 m above the bottom of the door.
-In the figure,the sum of the y-components of the forces,exerted on the door by hinges 1 and 2,is closest to:
A) 145 N
B) 165 N
C) 195 N
D) 225 N
E) 250 N
Correct Answer:

Verified
Correct Answer:
Verified
Q15: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB2706/.jpg" alt=" -In the figure,a
Q16: A uniform 1200 N beam that is
Q17: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB2706/.jpg" alt=" A 20 kg
Q18: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB2706/.jpg" alt=" -A 100 kg
Q19: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB2706/.jpg" alt=" -In the figure,what
Q21: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB2706/.jpg" alt=" -A uniform 600
Q22: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB2706/.jpg" alt=" -In the figure,a
Q23: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB2706/.jpg" alt=" -A 40 kg
Q24: A box of mass m is pulled
Q25: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB2706/.jpg" alt=" -A uniform 600