
Newton's laws review
Authored by Pamela Word
Science
11th Grade
NGSS covered
Used 12+ times

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27 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following does NOT describe one of Newton’s Laws of Motion?
All objects will remain in their current state of motion unless acted upon by an unbalanced force.
All forces in the universe occur in equal but oppositely directed pairs.
Objects will remain in motion even when unbalanced forces are applied.
The acceleration of an object is directly proportional to the net force acting on it and indirectly proportional to its mass.
Answer explanation
The statement 'Objects will remain in motion even when unbalanced forces are applied' is incorrect. According to Newton's laws, unbalanced forces change an object's state of motion.
Tags
NGSS.HS-PS2-1
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A stone that is being pushed forward with a force of 20 N and encounters a surface frictional force of 5 N. What is the net force acting on the stone?
20 N forward
5N backward
25N forward
15N forward
Answer explanation
The net force is calculated by subtracting the frictional force from the applied force: 20 N (forward) - 5 N (backward) = 15 N forward. Thus, the correct answer is 15 N forward.
Tags
NGSS.MS-PS2-2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A 25 kg object is given a net force of 500 N. What is its acceleration?
10 m/s²
20 m/s²
2 m/s²
250 m/s²
Answer explanation
Using Newton's second law, F = ma, we can find acceleration (a) by rearranging the formula to a = F/m. Here, a = 500 N / 25 kg = 20 m/s². Thus, the correct answer is 20 m/s².
Tags
NGSS.MS-PS2-2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of these statements about forces is always true?
Objects will accelerate when a balanced force is applied.
A force results only when two objects contact each other.
An action force is always equal and opposite to a reaction force.
A force is necessary to continue an object’s motion.
Answer explanation
The statement 'An action force is always equal and opposite to a reaction force' is true according to Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction.
Tags
NGSS.MS-PS2-2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A rock has two forces acting on it, 50 N to the left and 34 N to the right. If the box has a mass of 4 kg, what is its acceleration?
2.1 m/s² to the left
21 m/s² to the left
0.4 m/s² to the left
4m/s² to the left
Answer explanation
The net force is 50 N (left) - 34 N (right) = 16 N (left). Using F = ma, acceleration a = F/m = 16 N / 4 kg = 4 m/s² to the left. Thus, the correct answer is 4 m/s² to the left.
Tags
NGSS.MS-PS2-2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Alex holds a baseball weighing 1.4 N at rest on the palm of his hand. What is the net force acting on the baseball?
1.4 N
0.14 N
0 N
14 N
Answer explanation
The baseball is at rest, meaning the forces acting on it are balanced. The weight of the baseball (1.4 N) is countered by the upward force from Alex's hand, resulting in a net force of 0 N.
Tags
NGSS.MS-PS2-2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
According to Newton’s 2nd Law of Motion (F = ma), increasing the mass of an object will cause the acceleration to _____________
Increase
Decrease
Stay the same
Answer explanation
According to Newton's 2nd Law (F = ma), if the force (F) is constant and the mass (m) increases, the acceleration (a) must decrease to maintain the equation. Thus, increasing mass results in decreased acceleration.
Tags
NGSS.MS-PS2-2
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