Tag: a little effort, lot of work

Quizzes (2) Questions (46)

Questions Related to a little effort, lot of work

Multiple choice physics a little effort, lot of work motion in application common machines introduction to simple machines

A pulley system has a single fixed pulley and a single movable pulley. Its mechanical advantage is ____ .

  1. 1

  2. 2

  3. 3

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

The mechanical advantage (MA) of a pulley system is equal to the number of rope segments supporting the load. A system with one fixed and one movable pulley typically has two segments supporting the load, resulting in an MA of 2.

Multiple choice physics a little effort, lot of work motion in application common machines introduction to simple machines

A simple machine :

  1. magnifies the movement only

  2. enables to do more work by less effort

  3. changes the direction of force in all circumstances

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

Simple machines are designed to make work easier by allowing the user to apply less force over a greater distance, effectively magnifying the input force.

Multiple choice physics a little effort, lot of work motion in application common machines introduction to simple machines

The radius of the press cylinder in a hydraulic press is equal to the diameter of its pump cylinder. Its mechanical advantage is __________.

  1. 1

  2. 2

  3. 3

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

Mechanical advantage of a hydraulic press is the ratio of the area of the press cylinder to the area of the pump cylinder. Since Area = pi * r^2, and the radius of the press cylinder (R) is equal to the diameter of the pump cylinder (d = 2r), then R = 2r. The ratio of areas is (pi * R^2) / (pi * r^2) = (2r)^2 / r^2 = 4.

Multiple choice physics a little effort, lot of work motion in application common machines introduction to simple machines

A device which helps to lift heavy loads or speed up the motion or change the direction of force in the desired direction.

  1. Machine

  2. Magnets

  3. Motor

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

A machine is a device which helps us to lift heavy loads or speed up the motion or change the direction of force in the desired direction. It can be used to obtain a gain in speed or in many more actions.

Multiple choice physics a little effort, lot of work motion in application common machines introduction to simple machines

Any sloping flat surface along which a load can be easily pushed or pulled is called

  1. Inclined plane

  2. Wedge

  3. Screq

  4. Lever
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Any sloping flat surface along which a load can be easily pushed or pulled is called Inclined plane. An inclined plane is a sloping surface behaving like a simple machine and has a mechanical advantage of always greater than 1.