Physics · 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 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 simple machine common machines terms related to machines introduction to simple machines

Which of the following statements is 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 pushing a wheel chair easily.

  4. A crow bar is an example of second class lever
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A crowbar is a classic example of a first-class lever, where the fulcrum is between the effort and the load. Therefore, stating it is a second-class lever is incorrect.