Acounter attendant in a diner shoves a ketchup bottle with a mass 0.30 kg along a smooth, level lunch counter. the bottle leaves her hand with an initial velocity 2.8 m/s. as it slides, it slows down because of the horizontal friction force exerted on it by the countertop. the bottle slides a distance of 1.0 m before
coming to rest. what are the magnitude and direction of the friction force acting on it?

1.176 N

Explanation:

= mass of the bottle = 0.30 kg

= initial speed of the bottle = 2.8 m/s

= final speed of the bottle = 0 m/s

= stopping distance traveled = 1.0 m

= magnitude of frictional force acting on bottle

Using work-change in kinetic energy theorem

N

direction :

frictional force acts in opposite direction of motion.

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.