Physics ยท Science General

Newtonian Mechanics and Forces

1,605 Questions

Newtonian mechanics studies the motion of objects and the physical laws governing them. This hub covers friction, gravitational force, inertia, and vector quantities. Mastering these fundamental physics concepts is essential for various government competitive exams.

Laws of motionFriction and inertiaVector and scalar quantitiesGravitational accelerationArchimedes principle

Newtonian Mechanics and Forces Questions

Multiple choice

Which of the following is NOT a force that influences wind?

  1. Coriolis Effect

  2. magnetic field

  3. pressure gradient

  4. friction
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The primary forces influencing wind are the pressure gradient force, the Coriolis effect, and friction. A magnetic field does not directly influence wind patterns.

Multiple choice

When one object is orbiting another object, the acceleration due to gravity depends on:

  1. The sum of the masses of both objects

  2. Only the mass of the object being orbited

  3. Only the mass of the orbiting object

  4. The product of both masses
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The acceleration of an orbiting object is determined by the gravitational field of the body it is orbiting. The mass of the orbiting object itself cancels out in the calculation of acceleration.

Multiple choice

Newton's third law states that:

  1. An object in motion will remain in motion

  2. Every action has an equal and opposite reaction

  3. F = ma

  4. Fig Newtons are gross
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Newton's third law of motion states that for every action, there is an equal and opposite reaction. Option A describes the first law, and Option C describes the second law.

Multiple choice

When you stretch out a rubber band you are transforming

  1. potential energy to kinetic energy

  2. sound energy into kinetic energy

  3. kinetic energy to potential energy

  4. chemical energy to potential energy
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When you stretch a rubber band, you are doing work on it, which converts the kinetic energy of your muscles into elastic potential energy stored in the band.

Multiple choice

When is kinetic energy transferred from one object to another?

  1. When those objects pass one another

  2. None

  3. When those objects are in two places

  4. When those objects collide
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Kinetic energy is the energy of motion. When two objects collide, energy is transferred between them through the force of the impact.

Multiple choice

What has the least kinetic energy?

  1. A car

  2. A satellite orbiting in space

  3. An object that is not moving
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Kinetic energy is defined as the energy of motion (KE = 1/2 * m * v^2). If an object is not moving, its velocity is zero, meaning its kinetic energy is zero, which is the minimum possible value.

Multiple choice

What would have the greatest kinetic energy?

  1. A car driving down a hill

  2. A ball rolling down a hill

  3. A person running down a hill

  4. Guy rolling down the hill
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Kinetic energy depends on mass and velocity (KE = 1/2 * m * v^2). A car has significantly more mass than a ball, a person, or a single individual, leading to much higher kinetic energy at similar speeds.

Multiple choice

What does kinetic energy depend on?

  1. The weight and volume of an object

  2. The mass and speed of an object

  3. The buoyancy of an object
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The formula for kinetic energy is KE = 1/2 * mass * velocity^2. Therefore, it is directly dependent on the mass of the object and the square of its speed.

Multiple choice

What is an example of kinetic energy at work?

  1. A ball lodged in a tree

  2. A car in the garage

  3. A frisbee flying through the air

  4. Standing
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Kinetic energy is the energy of an object in motion. A frisbee flying through the air is actively moving, whereas the other options describe stationary objects.

Multiple choice

What is kinetic energy?

  1. The stored energy of an object due to its position.

  2. The energy an object has due to its motion

  3. The energy an object might have if it existed
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Kinetic energy is the energy possessed by an object due to its motion. Potential energy, by contrast, is stored energy based on position.

Multiple choice

What is a false statement about speed and velocity?

  1. Velocity is a vector quantity

  2. Speed indicates direction

  3. speed is a scalar quantity

  4. Velocity measures speed in a direction
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Speed is a scalar quantity and does not indicate direction, whereas velocity is a vector quantity that includes direction. Therefore, saying speed indicates direction is false.

Multiple choice

What is speed?

  1. the distance an object moves over time

  2. the direction an object is going

  3. how far away an object is

  4. an object is stationary
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Speed is defined as the rate at which an object covers distance over a period of time.