A smooth ice puck of mass is at rest on a horizontal ice surface

PHYSICS · Subjective · CBSE · Physics · Laws of Motion · Laws of Motion

Problem

A smooth ice puck of mass

0.50\,\text{kg}

is at rest on a horizontal ice surface. Starting at

t=0

, a horizontal force of the form

F(t)=10\,e^{-2t}\,\text{N}

acts on the puck for

3.0\,\text{s}

and then ceases. (a) Find the magnitude of the impulse imparted to the puck in the interval

0 \le t \le 3.0\,\text{s}

. (b) Calculate the puck’s speed immediately after the force stops acting. (c) Determine the average force on the puck over the same time interval.