Tick the Most Appropriate Answer. the Force Applied on a Machine to Do Work is Called the Load Effort Efficiency Fulcrum

Tick the most appropriate answer.

The force applied on a machine to do work is called the

MCQ

effort

shaalaa.com

Is there an error in this question or solution?

Chapter 4: Simple Machines - Exercises 1

Chapter 4 Simple Machines
Exercises 1 | Q 1

Write true or false of the following statement.

A gum bottle lying on a table has no energy.

State two factors on which the potential energy of a body at a certain height above the ground depends.

Define the term 'watt'.

Derive the relation between commercial unit of energy (kWh) and SI unit of energy (joule).

Take two aluminium channels of different lengths.
Place the lower ends of the channels on the floor and hold their upper ends at the same height.
Now take two balls of the same size and weight and release them from the top end of the channels. They will roll down and cover the same distance.

At the moment of releasing the balls, which energy do the balls have?
As the balls roll down which energy is converted into which other form of energy?
Why do the balls cover the same distance on rolling down?
Note: The question is wrong. It should be "Why do the balls cover the same distance after rolling down"?
What is the form of the eventual total energy of the balls?
Which law related to energy does the above activity demonstrate? Explain.

If the energy of a ball falling from a height of 10 metres is reduced by 40%, how high will it rebound?

Observe the picture and put a tick (✓) if work is done and put a cross (x) if work is not done.