Awooden crate of mass m = 70 kg slides horizontally off the back of a flatbed truck traveling at 80 km/hr. determine the kinetic coefficient of friction between the road and the crate if the crate slides (without tumbling) a distance of d = 50 m on the ground before coming to rest. assume the initial speed of the crate is the same as that of the truck.

0.51

Explanation:

m = Mass = 70 kg

g = Acceleration due to gravity = 9.81 m/s²

t = Time taken

u = Initial velocity = 80 km/h = 80/3.6 = 22.22 m/s

v = Final velocity

a = Acceleration

s = Displacement = 50 m

Kinetic coefficient of friction between the road and the crate is 0.51

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.