CLASS-VIII
PHYSICS
(QUESTION BANK)
CHAPTER-11 FORCE AND PRESSURE
Q1. Write any four effects of Force.
Q2. Define contact force and non-contact force.
Q3. Define Pressure and also write its formula and unit.
Q4. What is the requirement for a force to come into play?
Q5. What happens in a tug of war when two teams pull equally
hard?
Q6. Name the term used to express the strength of a force.
Q7. What are the two states of motion?
Q8. What is atmospheric pressure?
09. In which situation the net force becomes zero?
Q10. In which direction the force of friction acts on a moving body?
Answers
Answer:
1.
- a force can move a stationary object
- a force can stop a moving object
- it can change direction of a object
- force can chang shape and size of an object
2. contact force : a force which can be excerted by an object on another object only through 'physical touch' is called a contact force.
non contact : a force can be excerted by an object on another obect even from a distance is called non contact force
3. pressure is the force acting on a unit area of the object. the SI unit of pressure is newton per sq (N/m²)
8. atmospheric pressure is the air pressure which is excerted by the weight of air present in atmosphere.
10. it acts on opposite direction
Answer:
Explanation:
1.
a force can move a stationary object
a force can stop a moving object
it can change direction of a object
force can chang shape and size of an object
2. contact force : a force which can be excerted by an object on another object only through 'physical touch' is called a contact force.
non contact : a force can be excerted by an object on another obect even from a distance is called non contact force
3. pressure is the force acting on a unit area of the object. the SI unit of pressure is newton per sq (N/m²)
8. atmospheric pressure is the air pressure which is excerted by the weight of air present in atmosphere.
10. it acts on opposite direction