Author Question: A 1.2-kg object moving with a speed of 8.0 m/s collides perpendicularly with a wall and emerges with ... (Read 43 times)

karen · **on:** Jul 28, 2018

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

Question 2

A 2 000-kg truck traveling at a speed of 6.0 m/s makes a 90 turn in a time of 4.0 s and emerges from this turn with a speed of 4.0 m/s. What is the magnitude of the average resultant force on the truck during this turn?
a. 4.0 kN
b. 5.0 kN
c. 3.6 kN
d. 6.4 kN
e. 0.67 kN