Warrantless searches often take place at the entry points into the United States, including border crossings, ports, and airports.

The good faith exception can only be used in federal cases due to United States v. Leon (1984).

As shown in the figure, a 4.0-kg block is moving at 5.0 m/s along a horizontal frictionless surface toward an ideal spring (spring constant=100 N/m) that is attached to a wall. After the block collides with the spring, what is the compression X of the spring? 

As shown in the figure, a 10.0 m long bar is attached by a frictionless hinge to a wall and held horizontal by a light rope that makes an angle θ = 49° with the bar. The bar is uniform and has a mass of 7 kg. What distance x from the hinge should a 10.0 kg mass be suspended for the tension in the rope to be 180 N?

An object with a mass of 10 kg is initially at rest at the top of a frictionless inclined plane that rises at 80° above the horizontal. At the top, the object is initially 3.0 m high from the floor, as shown in the figure. When the object is released from this position, it eventually stops at a distance d from the bottom of the inclined plane along a horizontal surface, as shown. The coefficient of static and kinetic friction between the horizontal surface and the object is 0.6 and 0.2, respectively, and air resistance is negligible. Find the distance d.

A block of mass m = 30 kg and speed V is behind a block of mass M = 80 kg and speed of 0.5 m/s as shown in the figure. The surface is frictionless and the blocks collide and couple. After the collision, the blocks have a common speed of 0.9 m/s. What is the initial speed V of the 30-kg block?

The reading of a suspect’s Miranda warnings occurs during the initial hearing.

Life course theories of criminal behavior attempt to identify important developmental pathways to criminal behavior.

Which is one of the historical periods of American policing?

A civilian review board is a citizens’ committee formed to investigate complaints against the police.