AnswersKCPS Physics First 2027Newton's Laws of Motion

Newton's Laws of Motion — Quiz Answers

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According to Newton’s first law of motion, when will an object at rest begin to move?

A
when two equal and opposite forces act upon it
B
when the action and reaction forces are equal
C
when an unbalanced force acts upon it
D
when its inertia decreases to zero
4

Juan inflates a balloon and then releases its end to let the balloon go free as air comes out. The balloon then flies around the room. Which statement describes how this example is an application of Newton’s laws of motion?

A
According to Newton’s third law of motion, the balloon is pushed forward as the air is forced out.
B
According to Newton’s first law of motion, the balloon continues moving until the forces on it are unbalanced.
C
According to Newton’s second law of motion, the balloon exerts a force on the air, which exerts a force back on the balloon.
D
According to Newton’s third law of motion, the balloon resists any change of motion unless an unbalanced force acts upon it.
5

How do Newton’s laws of motion explain why it is important to keep the ice smooth on a hockey rink so that players can pass a puck as quickly as possible?

A
Smooth ice decreases the reaction force that the ice exerts on the hockey puck.
B
Smooth ice increases the force used to accelerate the hockey puck.
C
Smooth ice reduces the inertia of the hockey puck.
D
Smooth ice reduces the unbalanced forces that would slow the hockey puck.
6

Laura sees a horse pulling a buggy. Which statement best describes the forces acting on the horse and buggy?

A
The net forces exerted on the horse and cart are the same, but the action force is larger.
B
The net forces exerted on the horse and cart are not the same, so the two forces cancel out.
C
The net forces exerted on the horse and cart are the same, but they are in the same direction.
D
The net forces exerted on the horse and cart are not the same, so they are not balanced forces.
9

Rahul sits in a chair reading a book. Which force is equal to the force Rahul exerts on Earth?

A
Rahul’s weight
B
the sum of the weights of the chair, Rahul, and the book
C
Rahul's mass
D
the sum of the weights of Rahul and the book
10

A force of 5 cap n accelerates an object. The object’s mass is 50 g What is the acceleration of the object? (Formula: cap f is equal to ma )

A
10 the fraction with numerator m and denominator s squared
B
0 point 1 the fraction with numerator m and denominator s squared
C
100 the fraction with numerator m and denominator s squared
D
0 point 0 1 the fraction with numerator m and denominator s squared

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Newton's Laws of Motion — Quiz Answers — KCPS…