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A] 1) For a force to come into play, the two concerned bodies must TOUCH with each other
2) To draw water from a well, we have to PULL the rope.
3) An unbalanced force acting on a moving object may change its STATE OF REST or STATE OF MOTION.
4) In the game of cricket, the bails fall when the ball strikes them. This is an example of a REACTION force.
5) The force responsible for raising our body hair, when we try to take off a synthetic (terylene or polyster) shirt in dry weather conditions is an ELECTROSTATIC force.
6) The atmospheric pressure DECREASES as we move towards higher altitudes.
B] 1) False because even if we are changing the direction, effect will remain and will not get changed, for example, apply force on a body at rest in any direction, that force will cause motion (velocity/speed) in that body, in the respective direction.
2) True because force is a vector quantity in physics. Also, note in your mind, the unit of force should also be written.
3) False, it is a contact force which always opposes the motion.
4) False, because that upward force is balanced by the downward force and upward force generally highers than downward force for taking it upward overcoming downward forces.
5) True because when area is increasing, pressure acting on that surface area will decrease. Note this fact, if area is more, pressure is less on that area.
6) False bacause liquid pressure increases with depth. As depth increases, liquid pressure starts increasing and as a result pressure at bottom is greatest and pressure at surface of water is least.
2) To draw water from a well, we have to PULL the rope.
3) An unbalanced force acting on a moving object may change its STATE OF REST or STATE OF MOTION.
4) In the game of cricket, the bails fall when the ball strikes them. This is an example of a REACTION force.
5) The force responsible for raising our body hair, when we try to take off a synthetic (terylene or polyster) shirt in dry weather conditions is an ELECTROSTATIC force.
6) The atmospheric pressure DECREASES as we move towards higher altitudes.
B] 1) False because even if we are changing the direction, effect will remain and will not get changed, for example, apply force on a body at rest in any direction, that force will cause motion (velocity/speed) in that body, in the respective direction.
2) True because force is a vector quantity in physics. Also, note in your mind, the unit of force should also be written.
3) False, it is a contact force which always opposes the motion.
4) False, because that upward force is balanced by the downward force and upward force generally highers than downward force for taking it upward overcoming downward forces.
5) True because when area is increasing, pressure acting on that surface area will decrease. Note this fact, if area is more, pressure is less on that area.
6) False bacause liquid pressure increases with depth. As depth increases, liquid pressure starts increasing and as a result pressure at bottom is greatest and pressure at surface of water is least.
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