ANNUAL EXAMINATION – 2010 PHYSICS; CLASS - VII NAME: _________________________ Date: 26 – 02 – 10 (1st sit) Roll. No. ___________ F.M: 75 SECTION A (Answer all questions) QUESTION - 1. Fill in the blanks. (5) i) Making one complete round of a circular path of radius r‚ the net displacement is ___________________. ii) If a body is dropped from a certain height‚ its velocity increases due to __________. iii) The force of friction is always equal
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Inertia Inertia is the tendency for a body to either remain at rest or move in a straight line at a constant speed‚ unless acted up by an unbalanced force. In both cases‚ the item has an acceleration of zero. Inertia is not a force‚ but rather a resistance to a change in velocity. In other words‚ the object wants to stay put or stay constant‚ and inertia is what happens when a force gives it acceleration. An example of inertia in the physical world happens while riding in a car. The driver
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squared‚ and 5.11 m/s squared. It’s possible to use any two points to figure out and calculate acceleration due to gravity. Sir Isaac Newton used the word “mass” as a synonym for “quantity of matter.” Today‚ we precisely define mass as a “measure of inertia of a body.” The more mass an object has the more difficult it is to change it’s state of motion‚ whether it is at rest or moving without net force acting on that body. In other words‚ without an outside force a body will remain still if still‚ if
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Centrifugal ‘force’‚ however is not an actual force. Instead‚ it is the “tendency of an object following a curved path to fly outwards‚ away from the center of the curve‚” (Centrifugal Force vs. Centripetal Force‚ n.d.). This tendency is caused by inertia. An object at rest will stay at rest unless acted upon by a force. An object in motion will remain in motion until acted
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from the job. 4) jig beneficiation. Periodic vertical speed change of medium flow‚ repeatedly loose mineral particles group‚ intensive press the density stratification re-election process is known as the jig beneficiation. 5) shaker dressing. The inertia force generated by the reciprocating motion of the shaker surface asymmetry and water flushing effect‚ so that the swarm at the surface of the bed loose layering and haulage zoning‚ in order to achieve the job of sorting. 6) chute dressing. Beneficiation
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If I did not contact the ball at the top of arms reach I would loose acceleration because the force is greater when the arm is at full reach. By contacting the ball at full arms reach you are creating a longer leaver and increasing the moment of inertia by increasing the force upon which you can accelerate the arm forward to serve the ball. If the ball contacted beyond the top of arms reach the height of release is lower and it won’t make it over the net. If I do not have my arm stretched out to
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action as well. A player who is heavier is going to have a harder time jumping as high as a player with less mass. The next biomechanical principle I found that deals with basketball is another Newton law. Newton’s First Law deals with the law of inertia. This law is applied when a player is attempting a pass to his or her teammate. Newton’s First Law states that an object will stay in motion unless acted upon by another force. When a player is passing the ball to their teammate‚ the ball will stay
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studied very hard. Secondly‚ everyone knows Isaac Newton he created the laws of Inertia. When Newton is small‚ he likes to study and once he is sitting under an apple tree and apple dropped on his head. He thinks very hard about why the apple drops straight from the tree. He keeps doing experiments and he first find out Gravity and the formula for it "G=mg”. He keeps looking about the force and find inertia‚ inertia means that when a thing is not moving or moving by the speed but when a third force
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Moving About Inertia: What is Inertia? Inertia is a property of matter that causes it to resist changes in velocity (speed and/or direction) (Rouse‚ 2005). Basically Inertia is a word we use when we talk about matter and movement (Unknown Author‚ Unknown Date). This idea goes all the way back to Sir Isaac Newton‚ a great physicist. In Newton’s first law of motion it is stated that: 1. An object at rests tends to stay in rest 2. An object in motion tends to stay in motion A great example
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negligible). And an object which is thrown upward at an angle to the horizontal is also a projectile (provided that the influence of air resistance is negligible). A projectile is any object that once projected or dropped continues in motion by its own inertia and is influenced only by the downward force of gravity. By definition‚ a projectile has a single force that acts upon it - the force of gravity. If there were any other force acting upon an object‚ then that object would not be a projectile
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