ung answer type questions
1-Discuss the effects of force.
2-What is streamlined shape? Explain and give two examples.
3-Describe how friction can be reduced. In what way will it help if friction is redes
4-How can we increase friction between two surfaces?
Describe an activity to show that the force of friction between two surfaces depends on the nature of the surface in contact.
Answers
Answer:
A force acting on an object causes the object to change its shape or size, to start moving, to stop moving, to accelerate or decelerate. When there's the interaction between two objects they exert a force on each other, these exerted forces are equal in size but opposite in direction.
Answer:
Q1. effects of force:-
1. Force can change shape of an object.
2. Force can stop a moving object.
3. Force can move a stationary object.
4. Force can change direction of an object.
Q2. A special shape of the bodies which reduces the fluid friction is called as the streamlined shape. Example: Aquatic animals like fish, crocodile and sharks and the vehicles like cars, flights, ships ect. Streamlined shapes help reduce the amount of air drag when an object is moving.
Q3. Make the surfaces smoother. Rough surfaces produce more friction and smooth surfaces reduce friction.
Lubrication is another way to make a surface smoother. ...
Make the object more streamlined. ...
Reduce the forces acting on the surfaces. ...
Reduce the contact between the surfaces.
Q4. The three methods of increasing friction are: 1.) By applying more force to the object, 2.) By increasing the mass of the object that is causing friction, and 3.) By creating a rougher point of contact.
Explanation:
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