A 12-Kg Object Moving with a Speed of 8

question 31

Multiple Choice

A 1.2-kg object moving with a speed of 8.0 m/s collides perpendicularly with a wall and emerges with a speed of 6.0 m/s in the opposite direction. If the object is in contact with the wall for 2.0 ms, what is the magnitude of the average force on the object by the wall?

• A) 9.8 kN
• B) 8.4 kN
• C) 7.7 kN
• D) 9.1 kN
• E) 1.2 kN