Advertisements
Advertisements
Question
When is work said to be done by a force?
Advertisements
Solution
Work is said to be done when a force moves an object through a distance in its own direction.
APPEARS IN
RELATED QUESTIONS
What do you understand by a machine?
What care would you take to increase the life span of a machine which you use?
Write the relation between mechanical advantage, velocity ratio and efficiency.
Give scientific reason for the following:
Passengers in a bus are pushed backward when it starts suddenly.
Define simple machine.
Can a simple machine act as a force multiplier and a speed multiplier at the same time?
Write an expression to show the relationship between mechanical advantage, velocity ratio, and efficiency for a simple machine.
Classify the following as a lever, a pulley and an inclined plane:
A wedge
Classify the following as a lever, a pulley and an inclined plane:
A slide
Identify and mention the types of simple machines.
![]() |
![]() |
![]() |
| ______ | ______ | _______ |
![]() |
![]() |
![]() |
| ______ | ______ | ______ |






