Fill in the blanks:- (a) To draw Water from the well, we have to __________ a the rope.(b) If the two forces applied to an object are equal, and act in opposite directions, the net force acting on the object will be __________.(c) Force could be a __________ or a __________. (d) Force has magnitude as well as __________.(e) A force arises due to __________ between two objects.(f) A charged body __________ an uncharged body towards it.(g) The north pole of magnet __________ he north pole of another magnet.(h) Force acting on a unit area is called __________.(i) The pressure exerted by the liquid __________ with depth.(j) A drinking straw works on the existence of the __________ pressure.(k) Atmospheric pressure __________ with increasing height.
(a) To draw Water from the well, we have to pull the rope.
(b) If the two forces applied to an object are equal, and act in opposite directions, the net force acting on the object will be zero (0).
(c) Force could be a push or a pull.
(d) Force has magnitude as well as direction.
(e) A force arises due to interaction or contact between two objects.
(f) A charged body attracts an uncharged body towards it.
(g) The north pole of magnet repels the north pole of another magnet.
(h) Force acting on a unit area is called pressure.
(i) The pressure exerted by the liquid increases with depth.
(j) A drinking straw works on the existence of the atmospheric pressure.
(k) Atmospheric pressure decreases with increasing height.
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- Fill in the following blanks with suitable words:(a) To draw water from a well, we have to .............at the rope.(b) If the two forces applied to an object are equal and act in opposite directions, the net force acting on the object will be ................(c) Force could be a .............or a ...........(d) Force has magnitude as well as ..............(e) A force arises due to................between two objects.(f) A charged body............an uncharged body towards it.(g) The north pole of a magnet............the north pole of another magnet.(h) Force acting on a unit area is called ..................(i) The pressure exerted by a liquid ..........with depth.(j) A drinking straw works on the existence of ...................pressure.(k) Atmospheric pressure.............with increasing height.
- Fill in the blanks in the following statements.$(a)$. To draw water from a well we have to ________ at the rope.$(b)$. A charged body _______ an uncharged body towards it.$(c)$. To move a loaded trolley we have to ________ it.$(d)$. The north pole of a magnet _________ the north pole of another magnet.
- A pressure of $10\ Pa$ acts on an area of $3.0\ m^2$. What is the force acting on the area ? What force will be exerted by the application of same pressure if the area is made one-third ?
- State True or False for the following statements. 1.The effect of a force may change by changing the direction of the applied force. 2.A force has to be specified both in terms of its magnitude as well as its direction. 3.Frictional force is an example of a non-contact force. 4.A gas filled balloon moves up. The upward force acting on it is smaller than the force of gravity, i.e.(the downward acting force). 5.We can reduce the pressure of a given force by increasing the area over which the force acts.
- According to the third law of motion when a body exerts a force on another body then the other body also exerts force and both are equal and opposite. So when earth exerts a force on a falling apple then the force of the same magnitude should be exerted by the apple also towards earth. So why don't the earth moves towards the apple as force is equal?
- What is the net force on an object when equal and opposite force is applied on it?
- A force of $250\ N$ is acting on an area of $5\ m^2$. Calculate the pressure.
- State the relation between the momentum of a body and the force acting on it.
- When we talk of a force acting on a body, it usually means:$(a)$. electrical force$(b)$. balanced force$(c)$. unbalanced force$(d)$. nuclear force
- In figure, two boys A and B are shown applying force on a block. If the block moves towards the right, which one of the following statements is correct?$(a)$ Magnitude of force applied by A is greater than that of B$(b)$ Magnitude of force applied, by A is smaller than that of B$(c)$ Net force on the block is towards A$(d)$ Magnitude of force applied by A is equal to that of B"
- Name the principle which gives the magnitude of buoyant force acting on an object immersed in a liquid.
- (a) Define pressure.(b) What is the relation between pressure, force and area ? ,(c) Calculate the pressure when a force of $200\ N$ is exerted on an area of:(i) $10\ m^2$(ii) $5\ m^2$
- What is the scientific name of the ‘upward force’ acting on an object immersed in a liquid ?
- If we release a magnet held in our hand, it falls to the ground. The force which makes the magnet fall down is an example of:$(a)$. balanced force$(b)$. unbalanced force$(c)$. magnetic force$(d)$. muscular force
- Name the scientist who gave he magnitude of buoyant force acting on a solid object immersed in a liquid.
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