Title 01. FORCE AND PRESSURE.pdf ✅

01. FORCE AND PRESSURE WORKSHEET 1 (1.) Two objects repel each other. This repulsion could be due to (1) Frictional force only (2) Electrostatic force only w33` (3) Magnetic force only (4) Either a magnetic or an electrostatic force (2.) Name the 'agent' which can change the state of motion of an object (1) Weight (2) Mass (3) Force (4) Pressure (3.) In above image, A brick is kept in three different ways on a table. The pressure exerted by the brick on the table will be : (1) Maximum in position A (2) Maximum in position B (3) Maximum in position C (4) Equal in all cases (4.) Examples of situations in which you push or pull to change the state of motion of objects. (1) Taking out water from well (2) Moving a cart in supermarket (3) Opening or closing a door (4) ALL OF THE ABOVE (5.) In a tug of war, when the two teams are pulling the rope, a stage comes when the rope does not move to either side at all. What can you say about the magnitudes and directions of the forces being applied to the rope by the two teams at this stage? (1) Equal, opposite (2) Unequal, in same direction (3) Zero, non specified (4) None of the above (6.) The force exerted by a magnet is called (1) Magnetic force (2) Frictional force (3) Gravitational force (4) None of the above (7.) Try to identify action involved in given case as a push and/or a pull. Action - A cricket ball hit by a batsman (1) Push, Pull (2) Push only (3) Pull only (4) Cannot Say (8.) In the following situations identify the agent exerting a force and the object on which it acts. State the form in which the effect of force is observable : Taking out paste from a toothpaste tube. (1) Force is exerted by toothpaste tube on fingers due to which toothpaste comes out from tube (2) Force is exerted by fingers on toothpaste tube due to which toothpaste comes out from tube
(9.) Does the force of gravitation exist between two astronauts in space? (1) YES (2) NO (10.) The figure above shows a man with a parachute. Will he come down with the same speed without the parachute? (1) YES (2) NO (11.) Try to identify action involved in given case as a push and/or a pull. Action - Opening or shutting a door (1) Push, Pull (2) Push only (3) Pull only (4) Cannot Say (12.) A force of 200 N is applied to an object of area 4 . Calculate the pressure. (1) 200 N/ (2) 800 N/ (3) 50 N/ (4) 150 N/ (13.) In the above figure, A brick is kept in three different ways on a table as shown. The pressure exerted by the brick on the table will be : (1) Maximum in position A (2) Maximum in position B (3) Maximum in position C (4) Same at all positions (14.) Name the type of forces involved in a coin falling to the ground on slipping from hand (1) Muscular force (2) Electrostatic force (3) Gravitational force (4) Frictional Force (15.) The force acting on a unit area of a surface is called? (1) Friction (2) Pressure (3) Mass (4) Power (16.) When a force acts over a large area of an object, it produces a ................. pressure. (1) Large (2) Small (17.) Try to identify action involved in given case as a push and/or a pull. Action - Drawing a bucket of water from a well (1) Push, Pull (2) Push only (3) Pull only (4) Cannot Say (18.) Which of these are non-contact forces? (1) Gravitational, Frictional force (2) Electrostatic, Muscular force (3) Gravitational, Magnetic force (4) Muscular, Frictional force (19.) Identify the actions involved in moving a book placed on a table as push or pull, or both. (1) Push (2) Pull (3) Both (4) None of the above
(20.) In above image fill (5), a push or pull is: (1) Work (2) Force (3) Power (4) Current
WORKSHEET 2 (21.) While sieving grains, small pieces fall down. Which force pulls them down? (1) Electrostatic force. (2) Gravitational force (3) Frictional force (4) Magnetic force. (22.) When a force acts over a small area of an object, it produces a ................. pressure. (1) Large (2) Small (23.) Paheli remembers that a magnet attracts a piece of iron towards it. What about repulsion between similar poles of two magnets? Is it a pull or a push? (1) Push (2) Pull (24.) A push or a pull on an object is called a _____. (1) Motion (2) Pressure (3) Force (4) None of the above (25.) Which one of the following forces is a contact force? (1) Force of gravity (2) Force of friction (3) Magnetic force (4) Electrostatic force (26.) State true or false : Friction always acts on all the moving bodies and its direction is always opposite to the direction of motion. (1) TRUE (2) FALSE (27.) A solid body weighing 240 N is placed on a wooden surface. The area of contact is found to be 3 . Calculate the pressure exerted by the body on the wooden surface. (1) 80 N/ (2) 60 N/ (3) 720 N/ (4) 240 N/ (28.) Observe the vessels A, B, C and D shown in the above figure carefully. Volume of water taken in each vessel is as shown in the figure. Arrange them in the order of decreasing pressure at the base of each vessel. (1) A>B>C>D (2) B>C>D>A (3) C>B>A>D (4) D>B>A>C (29.) What is the Direction of force ? (1) The direction in which the object is only pushed is called the direction of force. (2) The direction in which the object is only pulled is called the direction of force. (3) The direction in which the object is pushed or pulled is called the direction of force. (30.) State true or false : Lesser the area, greater is the effect of force. (1) TRUE (2) FALSE (31.) In this statement, identify the object on which force acts: Squeezing a piece of lemon between the fingers to extract its juice. (1) Lemon (2) Fingers (32.) An archer stretches her bow while taking aim at the target. She then releases