Author Question: The force fo static friction between two surfaces is parallel to the surface of contact, and in in ... (Read 79 times)

mia · **on:** Jul 29, 2018

The force fo static friction between two surfaces is parallel to the surface of contact, and in in the direction that opposes relative motion.

Indicate whether the statement is true or false

Question 2

A solid wood door, 90.0 cm wide by 2.00 m tall has a mass of 35.0 kg. It is ajar and at rest. A ball with a mass of 500 g is thrown perpendicular to the door with a speed of 20.0 m/s and hits the door 60.0 cm from the hinged side.

The ball rebounds with a speed of 16.0 m/s along the same line. How much energy is lost in the process? A) 29.8 J
B) 16.3 J
C) 14.9 J
D) 12.7 J
E) 4.79 J