By changing the direction of force, effort can not be reduced.
An almond nut can be cracked open by a lever of length 1m by applying a force of 100N. If the force is to be reduced to 25 N, what should be the length of the effort arm?
Which of the following is not an effect of force ? (a) a force can change the speed of a moving object (b) a force can change the direction of a moving object (c) a force can change the composition of a moving object (d) a force can change the shape and size of an object