The following formula gives the connection between the force, the mass and the acceleration:
F=ma
In our case we know the force and the mass. F=20N and m=10kg
a=F/m
a=20m/s^2/10=2<span>m/s^2</span>
The object is no longer stationary when it is applied by push or pull.
<h3><u>Explanation: </u></h3>
The stationary position of an object means it is at one spot and remains there until an external stimulus is added.
To move an object from it's stationary position, an external stimulus, a push or a pull is applied to it. This push or pull is called Force. It is used for the following:
a) Moving an object
b) Bringing a moving object to a stop
c) Changing the shape of an object
The effect of force on a stationary object is determined on the basis of it's two types: Balanced forces and Unbalanced forces
Balanced forces would either keep a stationary object in the same state or a moving object continues to move in the same direction and same speed as it did earlier. These forces are applied on an object from opposite directions and in equal amount.Unbalanced forces are two forces applied on an object. The forces are unequal in amount. They cause a change in the speed and direction of a moving object.
The lever is a movable bar that pivots on a fulcrum attached to or positioned on or across a fixed point. The lever operates by applying forces at different distances from the fulcrum, or pivot.
A lever amplifies an input force to provide a greater output force, which is said to provide leverage. The ratio of the output force to the input force is the mechanical advantage of the lever.
The mechanical advantage of the lever is increased by moving the fulcrum closer to the load i.e., by shifting the fulcrum towards the right. Moving the fulcrum away from the load has mechanical disadvantage as the distance between the load and the fulcrum increases, the input force becomes greater than the output force.
Answer:
because microscope is used to look bacteria