[MC] Physics - Newton's law of Motion and its Applications

Question Type: Multiple Choice

A mass sliding down a frictionless inclined plane has how many forces in its FBD?

A. 4

B. 1

C. 2

D. 3

C. 2

Question Type: Multiple Choice

A brick slides on a horizontal surface. Which of the following will increase the magnitude of the frictional force on it?

A. Decreasing the surface area of contact

B. Putting a second brick on top

C. Decreasing the mass of the brick

D. Increasing the surface area of contact

B. Putting a second brick on top

Question Type: Multiple Choice

A horizontal shove of at least 200 N is required to start moving a 800-N crate initially at rest on a horizontal floor. The coefficient of static friction is:

A. 0.064

B. 0.64

C. 0.25

D. 0.025

C. 0.25

Question Type: Multiple Choice

A crate resting on a rough horizontal floor is to be moved horizontally. The coefficient of static friction is 0.40. To start the crate moving with the weakest possible applied force, in what direction should the force be applied?

A. 50◦ below the horizontal

B. 66◦ below the horizontal

C. 24◦ above the horizontal

D. 22◦ above the horizontal

D. 22◦ above the horizontal

Question Type: Multiple Choice

A horizontal force of 5.0 N pushes a 0.50-kg book against a vertical wall. The book is initially at rest. If the coefficients of friction are µs = 0.6 and µk = 0.80, the magnitude of the frictional force is:

A. 4 N

B. 2 N

C. 5 N

D. 3 N

A. 4 N

Question Type: Multiple Choice

A box rests on a rough board 10 meters long. When one end of the board is slowly raised to a height of 6 meters above the other end, the box begins to slide. The coefficient of static friction is:

A. 0.75

B. 0.90

C. 0.025

D. 0\. 25

A. 0.75

Question Type: Multiple Choice

If an object is moving at a constant speed in a straight line, what can you conclude about the net force acting on it?

A. The net force is decreasing

B. The net force is zero

C. The net force is increasing

D. The net force is changing direction

B. The net force is zero

Question Type: Multiple Choice

Which law of motion explains why a soccer ball keeps rolling after being kicked?

A. Newton's First Law

B. none of the above

C. Newton's Second Law

D. Newton's Third Law

A. Newton's First Law

Question Type: Multiple Choice

What is the relationship between mass and inertia?

A. Inertia is not related to mass

B. Inertia is the same as mass

C. Inertia decreases with mass

D. Inertia increases with mass

D. Inertia increases with mass

Question Type: Multiple Choice

If a net force is applied to an object, what will happen to its motion?

A. It will speed up

B. It will slow down

C. It will change direction

D. All of the above

D. All of the above

Question Type: Multiple Choice

How does the force of gravity affect an object on an inclined plane?

A. It depends on the mass of the object

B. It remains constant regardless of the angle of the plane

C. It decreases as the angle of the plane increases

D. It increases as the angle of the plane increases

D. It increases as the angle of the plane increases

Question Type: Multiple Choice

What is the relationship between the mass of an object being lifted and the force required to lift it using a pulley system?

A. The force required is directly proportional to the mass

B. The force required is inversely proportional to the mass

C. The force required is independent of the mass

D. The force required depends on the speed of the pulley system

A. The force required is directly proportional to the mass

Question Type: Multiple Choice

According to Newton's first law, an object in uniform circular motion tends to:

A. Slow down gradually

B. Accelerate towards the center of the circle

C. ) None of the above

D. Move in a straight line

B. Accelerate towards the center of the circle

Question Type: Multiple Choice

What is the role of the tension force in uniform circular motion?

A. It has no effect on uniform circular motion

B. It opposes the motion

C. It provides the centripetal force

D. It increases the speed of the object

C. It provides the centripetal force

Question Type: Multiple Choice

What is the direction of tension in a rope or string connected to a hanging mass?

A. Downward

B. Sideways

C. It depends on the angle of the rope or string

D. Upward

D. Upward

Question Type: Multiple Choice

How does the angle of the rope or string affect the tension and acceleration of a hanging object?

A. The tension decreases and the acceleration remains constant as the angle increases

B. The tension remains constant and the acceleration decreases as the angle increases

C. The tension and acceleration decrease as the angle increases

D. The tension and acceleration increase as the angle increases

A. The tension decreases and the acceleration remains constant as the angle increases

Question Type: Multiple Choice

What is the SI unit for force?

A. Joule (J)

B. Meter per second squared (m/s^2)

C. Kilogram (kg)

D. Newton (N)

D. Newton (N)

Question Type: Multiple Choice

What is the centripetal force in uniform circular motion?

A. Force acting radially outward

B. Force acting radially inward

C. Force acting tangentially

D. Force acting perpendicular to the motion

B. Force acting radially inward

Question Type: Multiple Choice

What is the role of friction in uniform circular motion?

A. It increases the speed of the object

B. It opposes the motion

C. It has no effect on uniform circular motion

D. It provides the centripetal force

B. It opposes the motion

Question Type: Multiple Choice

How does the mass of the hanging object affect the tension in the rope or string?

A. The tension depends on the length of the rope or string

B. The tension increases as the mass increases

C. The tension decreases as the mass increases

D. The tension remains constant regardless of the mass

B. The tension increases as the mass increases

Question Type: Multiple Choice

How does the coefficient of friction affect the motion of an object on an inclined plane?

A. It depends on the angle of the inclined plane

B. It has no effect on the motion

C. It decreases the acceleration of the object

D. It increases the acceleration of the object

C. It decreases the acceleration of the object

Question Type: Multiple Choice

According to Newton's first law of motion, an object at rest will remain at rest unless acted upon by what?

A. Inertia

B. External force

C. Gravity

D. Friction

B. External force

Question Type: Multiple Choice

According to Newton's laws of motion, what happens to an object in motion if no external forces act on it?

A. It continues to move at a constant velocity

B. It accelerates

C. It changes direction

D. It comes to a stop

A. It continues to move at a constant velocity

Question Type: Multiple Choice

Which of Newton's laws is applicable to the motion of objects on an inclined plane?

A. Newton's Third Law

B. Newton's Second Law

C. Newton's First Law

D. All of the above

B. Newton's Second Law

Question Type: Multiple Choice

How does the applied force affect the acceleration of an object on an inclined plane?

A. The acceleration decreases as the applied force increases

B. The acceleration increases as the applied force increases

C. The acceleration remains constant regardless of the applied force

D. The acceleration depends on the angle of the inclined plane

B. The acceleration increases as the applied force increases

Question Type: Multiple Choice

What is the relationship between the weight of an object and the force exerted by the elevator floor?

A. The force exerted by the floor is greater than the weight of the object

B. The force exerted by the floor is equal to the weight of the object

C. The force exerted by the floor is less than the weight of the object

D. The force exerted by the floor depends on the speed of the elevator

B. The force exerted by the floor is equal to the weight of the object

Question Type: Multiple Choice

What is the relationship between force, mass, and acceleration according to Newton's second law of motion?

A. Force = mass x acceleration

B. Force = mass - acceleration

C. Force = mass / acceleration

D. Force = mass + acceleration

A. Force = mass x acceleration

Question Type: Multiple Choice

According to Newton's laws of motion, what happens when two objects of different masses collide?

A. The heavier object always exerts a greater force on the lighter object

B. The forces exerted by the two objects depend on their velocities

C. The lighter object always exerts a greater force on the heavier object

D. The forces exerted by the two objects are equal

D. The forces exerted by the two objects are equal

Question Type: Multiple Choice

Newton's second law of motion states that the acceleration of an object is directly proportional to what?

A. Its velocity

B. Its mass

C. The net force acting on it

D. Its displacement

C. The net force acting on it

Question Type: Multiple Choice

How does the speed of an object in uniform circular motion affect the magnitude of the centripetal force?

A. It depends on the radius of the circular path

B. Speed does not affect the magnitude of the centripetal force

C. Higher speed requires a higher centripetal force

D. Higher speed requires a lower centripetal force

C. Higher speed requires a higher centripetal force

Question Type: Multiple Choice

According to Newton's third law of motion, for every action, there is an equal and opposite what?

A. Force

B. Reaction

C. Acceleration

D. Inertia

B. Reaction