Question

a 500 g ball and a 200 g ball are dropped from a tower. both balls are the same size and there is no air resistance (friction). when do the balls hit the ground?
both balls hit the ground at the same time
the 200 g ball hits the ground first
the 500 g ball hits the ground first
question 12
1 pts
how does mass differ from weight?
mass and weight are the same thing
mass is the amount of matter in an object, while weight is the pull of gravity on that mass
mass changes depending on location, but weight does not
weight is the amount of matter in an object, while mass is the pull of gravity on that matter

Explanation:

• For the first question, in the absence of air - resistance, all objects in free - fall near the Earth's surface accelerate at the same rate ($g\approx9.8m/s^{2}$), regardless of their mass. So both balls hit the ground at the same time.
• For the second question, mass is a measure of the amount of matter in an object, and it is an intrinsic property. Weight is the force exerted on an object due to gravity, calculated as $W = mg$ where $m$ is mass and $g$ is the acceleration due to gravity.

Answer:

• Question 11: Both balls hit the ground at the same time
• Question 12: Mass is the amount of matter in an object, while weight is the pull of gravity on that mass