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The frustum will roll about but does not topple.
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The vertical line through its centre of gravity falls outside its base. Its centre of gravity is lowered when it is displaced. The frustum will topple with the slightest tilting. So it can return to its originalposition. The vertical line through its centre of gravity still falls within its base. Its centre of gravity is raised when it is displaced. The frustum can be tilted through quite a big angle without toppling.
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Stability is a measure of the body’s ability to maintain its original position. The centre of gravity of an object is the point through which the entire weight of the object appears to act.Įxplain the types of stability with suitable examples. What do you mean by constant acceleration?Ī body is said to have constant acceleration, if it travels is a straight line and its velocity increases or decreases by equal magnitude in equal intervals of time. Show the shape of the distance – time graph for the motion in the following cases. Velocity gives an idea of how fast the position changes, or Acceleration gives an idea of how fast the velocity changes. She moves in a straight line with constant velocity.Ĭorrect your friend who says “The acceleration gives the idea of how fast the position changes”. Rephrase the same sentence in fewer words using concepts related to motion. “She moves at a constant speed in a constant direction”. While the speed of object is constant, its velocity is changing, Ex: Merry-go-round, roller coaster, planets orbiting the sun. Describe with the help of examples.Īn object moving in uniform circular motion is moving around the perimeter of the circle with a constant speed. Length of scale : metre : : speed of aeroplane : _ĭisplacement / time : velocity : : speed / time : _Īll objects having uniform speed need not have uniform velocity. Velocity : metre/ second :: acceleration : _ In _ equilibrium its centre of gravity remains at the same height when it is displacementĬentre of gravity of the geometrical shaped object.The slope of the speed-time graph gives _.If the velocity of an object increases with respect to time, then the object is said to be in _ acceleration.The shortest distance between the two places is _.What is one way you might increase the stability of an object? Suppose a boy is enjoying a ride on a merry go round which is moving with a constant speed of 10 m/s. Which of the following figures represent uniform motion of a moving object correctly? The displacement after half a circle would beįrom the given v-t graph it can be inferred that the object is Tamilnadu Samacheer Kalvi 7th Science Solutions Term 1 Chapter 2 Force and Motion Samacheer Kalvi 7th Science Force and Motion Textual EvaluationĪ particle is moving in a circular path of radius r.
#Vector td guide around th pdf#
Students can Download Science Chapter 2 Force and Motion Questions and Answers, Notes Pdf, Samacheer Kalvi 7th Science Book Solutions Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus and score more marks in your examinations.
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