Newton's Second Law of Motion 8.7A Scope Assessment

While ice skating, two people push away from each other. Immediately after pushing away from each other, how will their motion change?

• Person 2 will move forward, and Person 1 will move backward with greater acceleration.

• Both people will move backward, but Person 1 will move with greater acceleration.

• Both will move backward with equal acceleration.

• Person 2 will move backward, and Person 1 will move forward with a greater acceleration.

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The pictures provided show a toy car as it moves toward the left. With the following forces acting on each toy car, which one will continue to accelerate toward the left?

• 12 N left, 15 N right

• 10 N left, 10 N right

• 14 N left, 7 N right

• 8 N left, 10 N right

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What happens to the acceleration of an object with a constant force when the mass of the object increases?

• The acceleration increases.

• The acceleration decreases.

• The acceleration doesn’t change.

• The acceleration can increase or decrease.

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In which of the following situations will the ball have the greatest acceleration?

• A golf ball with a mass of 0.045 kg is struck with a force of 1 N.

• A baseball with a mass of 0.142 kg is hit with a force of 5 N.

• A soccer ball with a mass of 0.45 kg is kicked with a force of 20 N.

• A bowling ball with a mass of 7.2 kg is thrown with a force of 60 N.

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In which of the following situations would the force shown, acting on a sphere of the given mass, result in the greatest acceleration?

• Force = 15 N, Mass = 2 kg

• Force = 2 N, Mass = 10 kg

• Force = 10 N, Mass = 5 kg

• Force = 25 N, Mass = 1 kg

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Three blocks are in the image provided. All three blocks have 150 N of force acting on them; however, their masses are different. Calculate the acceleration of each block. Round to the nearest tenth.

a

b

c

2.4

7.5

8

4.3

2.3

5

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The table below lists how much a car will accelerate and in which direction it will travel. Identify which image matches the description in each column. All cars have a mass of 1000 kg.

Groups:

(a) Car 1

,

(b) Car 2

,

(c) Car 3

• Accelerate towards the left

• Accelerate toward the left

• Stay still or move at a constant speed

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The image provided here shows the forces in newtons (N) acting on six different blocks. In which of the locations will the block experience acceleration? Circle the correct answer(s).

• Block 2

• Block 3

• Block 5

• Block 4

• Block 1

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Observe the image of boxes below. Students make predictions about what will happen to each of the boxes above. Which prediction is correct?

• Box 1 will accelerate left, and box 2 will accelerate right.

• Both boxes will remain still.

• Box 1 will accelerate right, and box 2 will accelerate left.

• Both boxes will accelerate left.

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Which statement below is correct?

• The net force on both boxes is the same.

• The net force acting on Box 1 is greater than zero, and the larger force is on the left; the net force acting on Box 2 is greater than zero, and the larger force is on the right.

• The net force acting on both boxes is greater than zero, and the larger force is on the left.

• The net force acting on Box 1 is greater than zero, and the larger force is on the right; the net force acting on Box 2 is greater than zero, and the larger force is on the left.

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