A smooth 4.0 kg wooden block slides on a frictionless horizontal table with a speed…
PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A smooth 4.0 kg wooden block slides on a frictionless horizontal table with a speed of 10 m/s. A rough patch on the table applies a constant horizontal force of 80 N opposite to the block’s motion for 0.25 s.
(a) Find the impulse delivered to the block by the rough patch.
(b) Calculate the speed of the block immediately after it has completely crossed the rough patch.