Machine helps us to apply the force in a ________ direction.
Name a machine for each of the following use :
(a) to multiply the force,
(b) to change the point of application of force,
(c) to change the direction of force,
(d) to obtain the gain in speed.
A single fixed pulley is used because it :
(a) ha sthe mechanical advantage greater than 1
(b) has the velocity ratio less than 1
(c) gives 100% efficiency
(d) helps to apply the effort in a convenient direction.
Machine helps us to apply the force at a ________ point.
Give two examples of when a machine is used to apply the force at a convenient point.