Exam 5: Newtons Laws of Motion

Object A, having mass $m _ { A }$ , is connected to object $\mathrm { B }$ , having mass $m _ { B }$ , by a massless cord. An upward force $P$ is applied to mass A, causing both masses to accelerate upward. Find the tension in the massless cord.

A 13.5-N net force is applied to a stationary object. The object moves a distance of 18 m in 10 seconds. The mass of the object is

A 13-kg mass initially at rest has a net force applied to it. The force causes the mass to reach a velocity of 12 m/s in eight seconds. The magnitude of the force is

A 5-kg mass is attached to a massless cord. The cord is wrapped around a massless pulley, and the other end of the cord is attached to a 3-kg mass. The two masses are released. Find the acceleration of the masses.

An object is dropped out of an airplane. It falls and eventually reaches a constant speed (terminal velocity). After the object reaches terminal velocity, which of the following statements is true?

An 8-kg mass is pulled across a smooth floor using a rope. The rope makes an angle of 28° with the floor. If the tension in the rope is 45 N, the acceleration of the 8-kg mass is

A 5-kg mass is attached to a massless cord. The cord is wrapped around a massless pulley, and the other end of the cord is attached to a 3-kg mass. The two masses are released. Find the tension in the cord.

Consider an object traveling at constant velocity. Which of the following statements is always true?

A stationary 32-kg mass has a 15-N net force applied to it. The velocity of the mass at $t = 5$ seconds is

An object traveling along a curved path (Euclidean geometry) at constant speed

A steel cable is tightly tied (horizontally) to two trees that are 8 meters apart. A 40-kg child hangs from the center of the cable-causing the center of the cable to be 1 cm below the original location (before the child grabbed the cable). The tension in the cable is

A small car is towing a heavy truck. The mass of the truck is four times larger than the mass of the car. If the force that the car is exerting on the truck is 2000 N, the force that the truck is exerting back on the car is

The fact that a dime pulls upward on the Earth with a force equal to the weight of the dime is an example of

A heavy truck is towing a small car. The mass of the truck is four times larger than the mass of the car. If the force that the truck is exerting on the car is 5000 N, the force that the car is exerting back on the truck is

A 4-kg mass is connected to a 6-kg mass by a massless cord. A 120-N upward force is applied to the 4-kg mass, causing both masses to accelerate upward. The upward acceleration of the masses is

A 4-kg mass is connected to a 6-kg mass by a massless cord. A 120-N upward force is applied to the 4-kg mass, causing both masses to accelerate upward. The tension in the massless cord is

A 21-kg mass is pushed up a smooth incline using a horizontal force. The incline makes an angle of 35° with the horizontal, and the acceleration of the mass along the incline is 1.5 m/s $2$ . Find the normal force exerted by the incline.

A 21-kg mass initially at rest on a smooth table has a horizontal force applied to it. The mass moves a distance of 30 meters in 5 seconds. The magnitude of the force is

A heavy object having mass $m _ { a }$ is attached to a massless cord. The cord is wrapped around a massless pulley, and the other end of the cord is attached to a lighter object having mass $m _ { b } \left( m _ { a } > m _ { b } \right)$ . The two masses are released. Find the acceleration of the masses.

A 6-kg mass is connected to a 4-kg mass by a massless cord. A 120-N upward force is applied to the 6-kg mass, causing both masses to accelerate upward. The tension in the massless cord is