A gun is made of a super-low-weight but strong material. The bullet for the gun is more massive than the gun itself. For such a gun

Consider a system containing three objects that move with different velocities. The objects can interact with each other through forces. In this system

A box is pushed across a rough horizontal floor by a force acting parallel to the floor in the direction of motion. A force doing no work during the motion is

A bullet is fired into a wall and comes to rest. Considering only the bullet as the system we can say that

In this diagram a force acting on a block is shown by the arrow labeled F. The mass of the block is known, as is the size of the force, but the observed acceleration is larger than F/m and so another force must act on the block. In which direction (A, B, C, or D) is this force?

A pendulum swings through 10 cycles in 2 seconds. The frequency of the pendulum is

A single constant 10-pound force F1 acts on a body, causing it to accelerate. Then, while F1 continues to act, a second constant force F2 is applied to the body, which comes to a momentary stop. The magnitude of F2 is

A car rounds a curve while maintaining constant speed. Which of the statements is correct?

If you drop a ball in the absence of air resistance, it accelerates downward at approximately 10 m/s2. If instead you throw the ball upward, then its downward acceleration after release is approximately

If an object has a larger potential energy than kinetic energy,