Force and pressure Worksheet-14
-
Force of friction is an example of non-contact force.
-
If two forces act in opposite directions on an object, the net force is the difference between the two forces.
-
The forces of friction can be reduced by using lubricants.
-
The force exerted per unit area is called magnitude.
-
A force can change the state of motion of an object.
-
A push or pull on an object is called force.
-
In order to stop any moving body one has to apply force in same direction of the motion of the moving body.
-
Forces that do not need physical contact are non contact forces.
-
Friction is a type of non contact force.
-
The force with which objects pull each other is gravitational force.
-
Gravitational force applied by smaller objects is higher as compared to massive objects.
-
In electric air purifiers dust and smoke gets attracted due to electrostatic force.
-
Magnetic force can attract nickel.
-
SI unit of force is pascal.
-
The branch of science which deals with the study of friction is tribology.
-
The forces used with our hands, legs, etc. are collectively called applied forces.
-
Friction is the resistance to motion experienced when two surfaces in contact move with respect to each other.
-
Force is a push, but not a pull on an object.
-
The weight of an object is because of the Earth’s electrostatic force.
-
The Earth’s gravitational force keeps us bound to Earth.
Answer:
-
False
-
True
-
True
-
False
-
True
-
True
-
False
Explanation: In order to stop any moving body one has to apply force in opposite direction to the motion of body.
-
True
-
False
Explanation: Friction is a type of contact force.
-
True
-
False
Explanation: Gravitational force applied by massive objects is higher as compared to smaller objects.
-
True
-
True
-
False
Explanation: SI unit of force is Newton.
-
True
-
True
-
True
-
False
Explanation: Force is a push or pull on an object.
-
False
Explanation: The weight of an object is because of the Earth’s gravitational force.
-
True
