Physics · Science General

Newtonian Mechanics and Forces

1,559 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 physics simple machine common machines terms related to machines introduction to simple machines

Relationship between the mechanical advantage and velocity ratio of an ideal machine is

  1. Velocity Ratio < mechanical advantage

  2. Velocity Ratio = Mechanical advantage

  3. Velocity ratio > Mechanical advantage

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

For ideal machine, efficiency = 1

effeciency = Mechanical advantage/ velocity ratio
So, for ideal machine, Mechanical advantage = velocity ratio

Multiple choice physics simple machine common machines terms related to machines introduction to simple machines

........ is defined as the ratio of the distance moved by effort and load, in the same time interval.

  1. Velocity ratio

  2. Mechanical advantage

  3. Both

  4. None
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Velocity ratio = $\displaystyle \frac { Distance\quad moved\quad by\quad the\quad effort }{ Corresponding\quad distane\quad moved\quad by\quad the\quad load } $
It only depends on the design of machine and is always same for a particular machine.

Multiple choice physics lever common machines terms related to machines introduction to simple machines

Which of the following statements in NOT correct?

  1. In a first order lever, the fulcrum is placed between the effort and the load.

  2. The mechanical advantage of a second class levers is greater than 1 as load is situated in between to effort and fulcrum.

  3. An inclined plane in a hospital, helps in pushing a wheel chair easily.

  4. A crow bar is an example of second class level.
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
Multiple choice physics lever common machines terms related to machines introduction to simple machines

Mechanical advantage of a second order lever is :

  1. always less than one

  2. less than or equal to one

  3. always greater than one

  4. greater than or equal to one
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In a second-class lever, the load is between the fulcrum and the effort. This means the effort arm is always longer than the load arm, resulting in a mechanical advantage always greater than 1.

Multiple choice physics lever common machines terms related to machines introduction to simple machines

When the same amount of force is applied :

  1. A nail travels more distance than a screw into the wood board

  2. Screw travels more distance than the nail

  3. Both pierce the wood board to equal distance

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A screw is an inclined plane wrapped around a cylinder. When force is applied, the screw must rotate multiple times to penetrate the wood, resulting in a longer travel distance compared to a nail, which is driven straight in.