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KINEMATICS-1

KINEMATICS-1

KINEMATICS-1

GRAVITATION

KINEMATICS-2

A car starts from rest and moves with constant acceleration and covera the distance between two point 180m apart in 6s. Itsspeed as it passes the second point is 45ms−1 Find

a. Its acceleration

b. Its speed when it was at the point

c. The distance from the first point when it was at rest.

If the displacement of a body is zero is the distance covered by it necessarily zero ? Explain with suitable illustration.

A train 200m long is moving with a velocity of 72kmh−1 Find the time taken by the trainto cross the bridge 1km logn .

Gravitational acceleration on the surface of the planet is √611g. where g is the gravitational acceleration on the surface of the earth. The average mass density of the planet is 23 times that of the earth. If the escape speed on the surface of the earth is taken to be 11kms−1 the escape speed on the surface of the planet in kms−1 will be

A particle is projected with velocity u at angle θ with horizontal. Find the time when velocity vector is perpendicular to initial velocity vector.

(a) The velocity time graph of two bodies are shown in Figure. Slope of the graph for body A is positive. What does it signify ?

(b) The slope of velocity time graph of body B is negative. What does it represent ?

Graphs are very useful to represent a physical situation. Various quantities can be easily represented on graphs and other quantites can be determined from the graph. For example the slope of velocity-time graph represents instantaneous acceleration. For a motion with constant acceleration slope of velocity-time graph is constant. If acceleration is changing with time, slope with change and thus velocity-time graph will be a non-linear curve. Further the area of velocity-time graph gives displacement.

The velocity-time graph for two objects P and Q are shown. The ratio of their respective acceleration is

Graphs are very useful to represent a physical situation. Various quantities can be easily represented on graphs and other quantites can be determined from the graph. For example the slope of velocity-time graph represents instantaneous acceleration. For a motion with constant acceleration slope of velocity-time graph is constant. If acceleration is changing with time, slope with change and thus velocity-time graph will be a non-linear curve. Further the area of velocity-time graph gives displacement.

For the given velocity-time graph the possibly correct acceleration-time relationship is

Graphs are very useful to represent a physical situation. Various quantities can be easily represented on graphs and other quantites can be determined from the graph. For example the slope of velocity-time graph represents instantaneous acceleration. For a motion with constant acceleration slope of velocity-time graph is constant. If acceleration is changing with time, slope with change and thus velocity-time graph will be a non-linear curve. Further the area of velocity-time graph gives displacement.

The correct relation between v0,a1,a2andt0 is

Graphs are very useful to represent a physical situation. Various quantities can be easily represented on graphs and other quantites can be determined from the graph. For example the slope of velocity-time graph represents instantaneous acceleration. For a motion with constant acceleration slope of velocity-time graph is constant. If acceleration is changing with time, slope with change and thus velocity-time graph will be a non-linear curve. Further the area of velocity-time graph gives displacement.

The average velocity of the car for the entire trip is

निम्न ग्राफों का ढलान क्या प्रदर्शित करता है?

(i)स्थिति-समय ग्राफ, (ii) वेग –समय ग्राफ

[” The acceleration of a “],[” moving body can be found “],[” from “],[” (A) Area under velocity – time graph “],[” (B) Area under distance – time graph “],[” (C) Slope of the velocity – time graph “],[” (D) Slope of distance – time graph “]

1.The acceleration of a moving body can be found from (A) Area under velocity-time graph (B) Area under distance-time graph (C) Slope of the velocity-time graph (D) Slope of distance-time graph

What does the slope of a velocity-time graph represent?

Draw the velocity-time graph for uniformly accelerated motion. Show that slope of the velocity-time graph gives acceleration of the object.