Asolid metal ball and a hollow plastic ball of the same external radius are released from rest in a large vacuum chamber. when each has fallen 1 m, they both have the same: 1. momentum.2. inertia.3. speed.4. change in potential energy.5. kinetic energy

3. speed

Explanation:

Given that a solid metallic ball and a hollow plastic ball of same external radius are dropped in vacuum.

We can easily identify that the solid metallic ball will have more mass (hence weight) than the hollow ball of plastic. But since both the balls are falling in vacuum from the same height they will reach the ground at the same time and will bear the same speed at each of the corresponding point while falling.Since momentum, inertia, change in potential energy & kinetic energy are dependent on mass therefore these quantities will have different values for both the balls.

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction