*SCIENCE*( PHYSICS )
CLASS 8
CHAPTER - 'FORCE AND PRESSURE'
1. Define state of motion. What are the two states of motion?
2. Atleast how many objects are needed to apply force?
3.How does an applied force change the speed of an object?
4. What are the effects of force on an object?
5. What happens when two forces act in the same direction?
6. A person pushes a cart with a force of 15N. What is the magnitude?
7. Do you think sometimes application of force does not result in a change in the state of motion?Describe with an example.
8. Give two examples of situation in which applied force causes a change in the shape of anobject.
9. (A) Find the net resultant force.
(B) In which direction will the object move?
( DIAGRAM IN THE ATTACHMENT)
PLEASE GIVE CORRECT ANSWERS.I WILL MARK BRAINLIEST.
Answers
Answer: 1 . The state of motion of an object is defined by its velocity - the speed with a direction. ... An object at rest has zero velocity - and (in the absence of an unbalanced force) will remain with a zero velocity. Such an object will not change its state of motion(i.e., velocity) unless acted upon by an unbalanced force.
2. two objects
At least two objects must interact for a force to play a role. Interaction between the objects can be physical or non-physical
3.A force applied on an object may change its speed. If the force applied on the object is in the direction of its motion, the speed of the object increases. If the force is applied in the direction opposite to the direction of motion, then it results in a decrease in the speed of the object
4.Effects of Force. 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.
5. When two forces act in the same direction, they add together. Equal forces acting in opposite directions are called balanced forces. Balanced forces acting on an object will not change the object's motion. When you add equal forces in opposite direction, the net force is zero
6. 15 newton
7.An object may be at rest or in motion; both are its states of motion. It is common experience that many a time application of force does not result in a change in the state of motion. For example, a heavy box may not move at all even if you apply the maximum force that you can exert.
8.Two examples of forces that cause a change in the shape of an object are as follows: Squeezing of a plastic bottle changes the shape of the bottle. Deformation of clay by pressing it between the hands.
9. It will move in the 18 n direction
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Answer:
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Explanation:
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