Middle School Science Quiz: Mass Affects Motion

What this quiz covers

This quiz focuses on Mass Affects Motion, giving you a quick way to practice the rules, question types, and explanations that matter most for Middle School Science.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

Question 1

1. The loaded cart has a larger acceleration because it has more mass.
2. Both carts have the same acceleration because the push is the same.
3. The empty cart has a larger acceleration because it has less mass. (correct answer)
4. The empty cart has a smaller acceleration because lighter objects resist motion changes more.

Question 2

1. The heavier bowling ball has more inertia, so the same force produces a smaller acceleration. (correct answer)
2. The heavier bowling ball must have a larger acceleration because it has more mass.
3. Mass does not affect acceleration when the force is the same.
4. The soccer ball accelerates less because it has less mass to push against the floor.

Question 3

1. Acceleration decreases because there is less mass.
2. Acceleration increases because $a=F/m$ and $m$ is smaller. (correct answer)
3. Acceleration stays the same because the force is the same.
4. Acceleration becomes zero because the rocket is lighter.

Question 4

1. The $9\,\text{kg}$ sled accelerates 3 times as much as the $3\,\text{kg}$ sled
2. Both sleds have the same acceleration because the motors are identical
3. The $3\,\text{kg}$ sled accelerates 3 times as much as the $9\,\text{kg}$ sled (correct answer)
4. The $9\,\text{kg}$ sled accelerates slightly more because it has more mass to pull against

Question 5

1. It doubles
2. It stays the same
3. It is cut in half (correct answer)
4. It becomes four times larger

Question 6

1. Newton's Second Law says $a = Fm$, so larger mass gives larger acceleration for the same force
2. Newton's Second Law says $F = ma$, so for the same $F$, $a = F/m$ and the larger mass has smaller acceleration (correct answer)
3. Newton's Second Law says mass does not affect acceleration if the force is constant
4. Newton's Second Law says heavier objects experience more force even when pushed the same way

Question 7

1. The $4\,\text{kg}$ cart
2. All three carts have the same acceleration
3. The $1\,\text{kg}$ cart (correct answer)
4. The $2\,\text{kg}$ cart

Question 8

1. The bowling ball has more mass, so the same force produces a smaller acceleration (correct answer)
2. The soccer ball has more inertia because it is lighter
3. Heavier objects always move faster when kicked with the same force
4. Mass does not affect acceleration; the difference must be because the forces were not the same

Question 9

1. Acceleration decreases because less mass means less force
2. Acceleration stays the same because the force is the same
3. Acceleration increases because the same force acting on a smaller mass produces a larger acceleration (correct answer)
4. Acceleration becomes zero because the rocket is lighter

Question 10

1. 1 kg → 12 m/s², 2 kg → 6 m/s², 4 kg → 3 m/s² (correct answer)
2. 1 kg → 3 m/s², 2 kg → 6 m/s², 4 kg → 12 m/s²
3. 1 kg → 12 m/s², 2 kg → 12 m/s², 4 kg → 12 m/s²
4. 1 kg → 6 m/s², 2 kg → 12 m/s², 4 kg → 24 m/s²

Question 11

1. Acceleration increases as mass increases (direct relationship).
2. Acceleration decreases as mass increases (inverse relationship). (correct answer)
3. Mass and acceleration are equal for all trials.
4. Acceleration stays the same because the force is the same.

Question 12

1. 9 m/s²
2. 3 m/s²
3. 1 m/s² (correct answer)
4. 0.33 m/s²

Question 13

1. The claim is correct because force determines acceleration, not mass.
2. The claim is incorrect because acceleration depends on mass: with the same force, the 2 kg object accelerates more than the 6 kg object. (correct answer)
3. The claim is correct because heavier objects always move farther when pushed.
4. The claim is incorrect because heavier objects accelerate more for the same force.

Question 14

1. The full cart speeds up more because it has more mass
2. Both carts speed up the same amount because the force is the same
3. The empty cart speeds up more because the same force produces a larger acceleration for smaller mass (correct answer)
4. The full cart speeds up more because heavier objects have less inertia

Question 15

1. $3a$
2. $\tfrac{1}{3}a$ (correct answer)
3. $a$
4. $\tfrac{2}{3}a$

Question 16

1. The loaded cart has a larger acceleration because it has more mass.
2. Both carts have the same acceleration because the push is the same.
3. The empty cart has a larger acceleration because it has less mass. (correct answer)
4. The empty cart has a smaller acceleration because lighter objects resist motion changes more.

Question 17

1. Cart A: $1\,\text{m/s}^2$; Cart B: $2\,\text{m/s}^2$
2. Cart A: $4\,\text{m/s}^2$; Cart B: $2\,\text{m/s}^2$ (correct answer)
3. Cart A: $2\,\text{m/s}^2$; Cart B: $4\,\text{m/s}^2$
4. Cart A: $4\,\text{m/s}^2$; Cart B: $4\,\text{m/s}^2$

Question 18

1. Box H accelerates more because it has more mass.
2. Both boxes have the same acceleration because the same force is applied.
3. Box L accelerates more because $a=F/m$, so smaller mass gives larger acceleration. (correct answer)
4. Box L accelerates less because lighter objects have more inertia.

Question 19

1. Box H accelerates more because it has more mass.
2. Both boxes have the same acceleration because the same force is applied.
3. Box L accelerates more because $a=F/m$, so smaller mass gives larger acceleration. (correct answer)
4. Box L accelerates less because lighter objects have more inertia.

Question 20

1. It doubles.
2. It stays the same.
3. It becomes half as large. (correct answer)
4. It becomes four times as large.