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Consider gliders that slide friction-free along a horizontal air track. Glider A has a mass of 1 kg, a speed of 1 m/s, and collides with glider B, which has a mass of 5 kg and is at rest. If they stick upon collision the combined-glider speed will be

Two equal-sized buckets are brim-filled with water, one with a piece of floating wood and the other without. If the buckets are put on a weighing scale, the heavier one is

When wind encounters a wind turbine that produces energy, wind speed on the downside of the blades is

If there were no gravity, a ball thrown upward at an angle would follow a straight-line path. Due to gravity, however, at the end of 1 s it is

Air resistance on a high-speed projectile shortens its

When a 100-kg astronaut ejects 0.1 kg of gas at a speed of 50 m/s from her propulsion pistol, her recoil speed is

When an apple falls to the ground, momentum is transferred to the ground. The momentum absorbed by the ground is

A player catches a ball. Consider the action force to be the ball against the player’s glove. The reaction is the

A liter-sized block of wood floats in water. The volume of water displaced is

A supplier wants to make a profit by buying gold by weight at one altitude and selling it at the same price per newton at another altitude. The supplier should