SAMPLE QUESTION PAPER 2015 – I, 2015 SCIENCE Class – IX
... (c) On a hot sunny day, people sprinkle water on the roof or open ground. Explain with reason. (d) Write the factors which determine the state of a substance? ...
... (c) On a hot sunny day, people sprinkle water on the roof or open ground. Explain with reason. (d) Write the factors which determine the state of a substance? ...
Balanced Forces
... An object at rest will remain at rest and an object in motion will continue moving at a constant velocity unless acted upon by a net or unbalanced force. ...
... An object at rest will remain at rest and an object in motion will continue moving at a constant velocity unless acted upon by a net or unbalanced force. ...
force - Typepad
... • Friction is the "evil monster" of all motion. Regardless of which direction something moves in, friction pulls it the other way. – Move something left, friction pulls right. Move something up, friction pulls down. • It appears as if nature has given us friction to stop us from moving anything. ...
... • Friction is the "evil monster" of all motion. Regardless of which direction something moves in, friction pulls it the other way. – Move something left, friction pulls right. Move something up, friction pulls down. • It appears as if nature has given us friction to stop us from moving anything. ...
Force of Gravity
... Because falling objects don’t accelerate through their whole fall. Eventually, the force of air resistance pushing up against the object equals the force of gravity pulling down on the object. At this point the final or terminal speed is reached. So a heavy object (bowling ball) and a light object ( ...
... Because falling objects don’t accelerate through their whole fall. Eventually, the force of air resistance pushing up against the object equals the force of gravity pulling down on the object. At this point the final or terminal speed is reached. So a heavy object (bowling ball) and a light object ( ...
Section 2.10: Apparent Weight
... hit the water. In reality, a gravitational force is acting on you during your fall. What is missing is the upward reaction force provided by whatever supports your weight at other times—the seat of a chair, the floor of a room, the diving board, the water. It is useful to distinguish between the act ...
... hit the water. In reality, a gravitational force is acting on you during your fall. What is missing is the upward reaction force provided by whatever supports your weight at other times—the seat of a chair, the floor of a room, the diving board, the water. It is useful to distinguish between the act ...
Key
... The pull of the girl on the boat is greaterthan the opposingpull of friction,so the boat moves in the directionol the girl. 6. What is the relationshipbetweenslidingfriction and speed?Betweenslidingfrictionand normal force? Slidingtrictionis independentof speed.Slidingfrictionis proportionalto norma ...
... The pull of the girl on the boat is greaterthan the opposingpull of friction,so the boat moves in the directionol the girl. 6. What is the relationshipbetweenslidingfriction and speed?Betweenslidingfrictionand normal force? Slidingtrictionis independentof speed.Slidingfrictionis proportionalto norma ...
APCh04 - Mother Seton
... An object sliding down an incline has three forces acting on it: the normal force, gravity, and the frictional force. • The normal force is always perpendicular to the surface. • The friction force is parallel to it. • The gravitational force points down. If the object is at rest, the forces are the ...
... An object sliding down an incline has three forces acting on it: the normal force, gravity, and the frictional force. • The normal force is always perpendicular to the surface. • The friction force is parallel to it. • The gravitational force points down. If the object is at rest, the forces are the ...
Friction - WordPress.com
... pulled gently, friction starts up and matches the pulling force, but in the opposite direction, so the block doesn’t move. The harder you pull, the greater the friction force that is generated. Between any two surfaces there is a maximum friction force that can be generated – static friction force. ...
... pulled gently, friction starts up and matches the pulling force, but in the opposite direction, so the block doesn’t move. The harder you pull, the greater the friction force that is generated. Between any two surfaces there is a maximum friction force that can be generated – static friction force. ...
Newtons laws of Motion
... which the rocket moves upward. The motion of the rocket can be explained by Newton's third law, for every action there is an equal and opposite reaction. In other words, when one object exerts a force on another object, the second object exerts a force of equal strength in the opposite direction on ...
... which the rocket moves upward. The motion of the rocket can be explained by Newton's third law, for every action there is an equal and opposite reaction. In other words, when one object exerts a force on another object, the second object exerts a force of equal strength in the opposite direction on ...
OUR WO - Jnoodle
... Newton's third law says forces are always created in pairs and the pairs have equal magnitude and opposite direction. When an object rests or leans against a surface, the surface pushes back on the object with a force called a normal reaction. The normal reaction acts at 90 degrees to the surface. F ...
... Newton's third law says forces are always created in pairs and the pairs have equal magnitude and opposite direction. When an object rests or leans against a surface, the surface pushes back on the object with a force called a normal reaction. The normal reaction acts at 90 degrees to the surface. F ...
Pushes and Pulls Content 3. Daily examples of force
... • When the cue hits the ball, the ball also “hits” the cue. Action: the man pushes on the wall. Reaction: the wall pushes on the man. ...
... • When the cue hits the ball, the ball also “hits” the cue. Action: the man pushes on the wall. Reaction: the wall pushes on the man. ...
Outline - Newton`s Laws
... upon an object. All drawings are in a vertical plane and friction is negligible except in (b) and (d). Draw free body diagrams for the figures, scale the forces as close as possible. Label all the forces acting on the objects. If the object has an acceleration, show its direction. If there is no acc ...
... upon an object. All drawings are in a vertical plane and friction is negligible except in (b) and (d). Draw free body diagrams for the figures, scale the forces as close as possible. Label all the forces acting on the objects. If the object has an acceleration, show its direction. If there is no acc ...
force
... 1. An object will have greater acceleration if a greater force is applied to it 2. The mass of an object and the force applied to it affect acceleration ...
... 1. An object will have greater acceleration if a greater force is applied to it 2. The mass of an object and the force applied to it affect acceleration ...
Mechanical Equilibrium(star wars)
... Q: Is there motion in this situation? Is there a net force? normal force ...
... Q: Is there motion in this situation? Is there a net force? normal force ...
Preview of Period 4: Gravity, Mass, and Weight
... R.3 Where is the center of mass of the Moon? Where is the center of mass of a bagel? R.4 A penny and a feather placed inside of a vacuum jar with no air. If the penny and feather are dropped at the same time, which one reaches the bottom of the jar first? Now the penny and feather are removed from t ...
... R.3 Where is the center of mass of the Moon? Where is the center of mass of a bagel? R.4 A penny and a feather placed inside of a vacuum jar with no air. If the penny and feather are dropped at the same time, which one reaches the bottom of the jar first? Now the penny and feather are removed from t ...
A body acted on by no net force moves with constant velocity
... to move with constant speed in a straight line Inertial reference frames Galilean principle of relativity: Laws of physics (and everything in the Universe) look the same for all observers who move with a constant velocity with respect to each other. ...
... to move with constant speed in a straight line Inertial reference frames Galilean principle of relativity: Laws of physics (and everything in the Universe) look the same for all observers who move with a constant velocity with respect to each other. ...
Newton`s laws of motion
... Law Conservation of momentum can be explained by Newton’s third law. • Because action and reaction forces are equal and opposite, momentum is neither gained or lost in a ...
... Law Conservation of momentum can be explained by Newton’s third law. • Because action and reaction forces are equal and opposite, momentum is neither gained or lost in a ...
Powerpoint for today
... An object that is at rest will remain at rest and an object that is moving will continue to move in a straight line with constant speed, if and only if the sum of the forces acting on that object is zero. Newton's 2nd Law acceleration of an object = sum of forces acting on that object / the mass of ...
... An object that is at rest will remain at rest and an object that is moving will continue to move in a straight line with constant speed, if and only if the sum of the forces acting on that object is zero. Newton's 2nd Law acceleration of an object = sum of forces acting on that object / the mass of ...
A Mousetrap Powered Racer
... state of motion, the more inertia an object has the more force that will be required to change is state of motion. A heavy car will required more pulling force than a lighter car for equal acceleration; therefore, lighter cars will be easier to accelerate ...
... state of motion, the more inertia an object has the more force that will be required to change is state of motion. A heavy car will required more pulling force than a lighter car for equal acceleration; therefore, lighter cars will be easier to accelerate ...
Motion and Forces
... force needed to move the lion? F = ma = 175 kg x 0.657 m/s2 = 115 kg ● m/s2 = 115 N ...
... force needed to move the lion? F = ma = 175 kg x 0.657 m/s2 = 115 kg ● m/s2 = 115 N ...
TEST
... of 8 N. If this is the "action force", what is the "reaction force"? A. The string pulling upward on the toy with an 8 N force B. The ceiling pulls upward on the string with an 8 N force. C. The string pulls downward on the ceiling with an 8 N force. D. The toy pulls upward on the earth with an 8 N ...
... of 8 N. If this is the "action force", what is the "reaction force"? A. The string pulling upward on the toy with an 8 N force B. The ceiling pulls upward on the string with an 8 N force. C. The string pulls downward on the ceiling with an 8 N force. D. The toy pulls upward on the earth with an 8 N ...
Buoyancy
In science, buoyancy (pronunciation: /ˈbɔɪ.ənᵗsi/ or /ˈbuːjənᵗsi/; also known as upthrust) is an upward force exerted by a fluid that opposes the weight of an immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid. Thus the pressure at the bottom of a column of fluid is greater than at the top of the column. Similarly, the pressure at the bottom of an object submerged in a fluid is greater than at the top of the object. This pressure difference results in a net upwards force on the object. The magnitude of that force exerted is proportional to that pressure difference, and (as explained by Archimedes' principle) is equivalent to the weight of the fluid that would otherwise occupy the volume of the object, i.e. the displaced fluid.For this reason, an object whose density is greater than that of the fluid in which it is submerged tends to sink. If the object is either less dense than the liquid or is shaped appropriately (as in a boat), the force can keep the object afloat. This can occur only in a reference frame which either has a gravitational field or is accelerating due to a force other than gravity defining a ""downward"" direction (that is, a non-inertial reference frame). In a situation of fluid statics, the net upward buoyancy force is equal to the magnitude of the weight of fluid displaced by the body.The center of buoyancy of an object is the centroid of the displaced volume of fluid.