Exam 4: The Laws of Motion: Part A

A 4000-N weight is held suspended in equilibrium by two cables.Cable 1 applies a horizontal force to the right of the object and has a tension T₁.Cable 2 applies a force upward and to the left at an angle of 37.0° to the negative x axis and has a tension T₂.What is the tension T₁?

The coefficient of static friction between the tires of a car and the street is µ_s = 0.58.Of the following,what is the steepest inclination angle of a street on which a car can be parked (with wheels locked)without slipping?

As I pull a rope connected to a box at constant speed up a frictionless slope,pulling parallel to the slope,the tension in the rope will be:

A 12-kg mass is placed on a 25.0° incline,and friction keeps it from sliding.The coefficient of static friction in this case is 0.580,and the coefficient of sliding friction is 0.520.What is the frictional force in this situation?

A 2000-kg sailboat experiences an eastward force of 2000 N by the ocean tide and a wind force against its sails with magnitude of 6000 N directed toward the northwest (45° N of W).What is the magnitude of the resultant acceleration?

A 200-N block,on a 30° incline,is being held motionless by friction.The coefficient of static friction between the block and the plane is 0.60.The force due to friction is:

A rifle is aimed horizontally toward the center of a target 71 m away.If the bullet strikes 10 cm below the center,what was the velocity of the bullet? Note: Ignore air friction.

A box is launched up a frictionless incline with an angle of elevation θ.The maximum height reached by the box is h.The box is again launched up the incline with the same initial speed it had before,but this time the angle of elevation has been increased to φ.How does the maximum height H reached this time by the box compare with the previous value h?

A plane is moving due north,directly towards its destination.Its airspeed is 200 mph.A constant breeze is blowing from west to east at 60 mph.At what rate is the plane moving north?