(a) |A bullet of mass 20g hits a block of wood at a speed of 380 m/s. The bullet penetrates a depth of 5 cm and gets fixed in the wood. Calculate the average net force acting on the bullet while it is being brought to rest. How much time it takes to come to rest? Motion (b) A hockey puck has a mass of 1kg. If the coefficient of kinetic friction between the puck and ice is 0.15, and a force of 2.6 N is applied horizontally to the puck to push it to the right. What is the net force acting on the puck? (c) A Physics 1 student got confused by a seeming mg contradiction in Newton's laws and asks her teacher the following statement "Everything that moves, will finally come to a stop. Rest is the "natural" state of all
Displacement, Velocity and Acceleration
In classical mechanics, kinematics deals with the motion of a particle. It deals only with the position, velocity, acceleration, and displacement of a particle. It has no concern about the source of motion.
Linear Displacement
The term "displacement" refers to when something shifts away from its original "location," and "linear" refers to a straight line. As a result, “Linear Displacement” can be described as the movement of an object in a straight line along a single axis, for example, from side to side or up and down. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Linear displacement is usually measured in millimeters or inches and may be positive or negative.
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