Physics
The motion of a particle of mass m is given by x=0 for t
09
Nov
The motion of a particle of mass m is given by x=0 for t The motion of a particle of mass m is given by x=0 for t November 9, 2020 Category: Chapter 4 - Laws of Motion , NCERT Exemplar Class 11 , Physics ,
A cricket ball of mass 150 g has an initial velocity (3iˆ+ 4jˆ)ms^−1 and a final velocity v =−(3iˆ+4jˆ)ms^−1 after being hit. The change in momentum (final momentum initial momentum) is (in kg ms^−1)
31
Oct
A cricket ball of mass 150 g has an initial velocity (3iˆ+ 4jˆ)ms^−1 and a final velocity v =−(3iˆ+4jˆ)ms^−1 after being hit. The change in momentum (final momentum initial momentum) is (in kg ms^−1) A cricket ball of mass 150 g has an initial velocity (3iˆ+ 4jˆ)ms^−1 and a final velocity v =−(3iˆ+4jˆ)ms^−1 after being [...]
Two particles are projected in air with speed v0 at angles θ1 and θ2 (both acute) to the horizontal, respectively. If the height reached by the first particle is greater than of the second, then tick the right choices.
31
Oct
Two particles are projected in air with speed v0 at angles θ1 and θ2 (both acute) to the horizontal, respectively. If the height reached by the first particle is greater than of the second, then tick the right choices. respectively. If the height reached by the first particle is greater than of the second then [...]
(b) Earth also moves in circular orbit around the sun once every year with an orbital radius of 1.5 x 10^11 m. What is the acceleration of the earth (or any object on the surface of the earth) towards the centre of the sun? How does this acceleration compare with g = 9.8 m/s^2 ?
31
Oct
(b) Earth also moves in circular orbit around the sun once every year with an orbital radius of 1.5 x 10^11 m. What is the acceleration of the earth (or any object on the surface of the earth) towards the centre of the sun? How does this acceleration compare with g = 9.8 m/s^2 ? [...]
(a) Earth can be thought of as a sphere of radius 6400 km. Any object (or a person) is performing circular motion around the axis of the earth due to the earth rotation (period 1 day). What is the acceleration of object on the surface of the earth (at equator) towards its centre? What is it at latitude theta ? How does these accelerations compare with g = 9.8 m/s^2?
31
Oct
(a) Earth can be thought of as a sphere of radius 6400 km. Any object (or a person) is performing circular motion around the axis of the earth due to the earth rotation (period 1 day). What is the acceleration of object on the surface of the earth (at equator) towards its centre? What is [...]
A fighter plane is flying horizontally at an altitude of 1.5 km with speed 720 km/h. At what angle of sight (w.r.t. horizontal) when the target is seen, should the pilot drop the bomb in order to attack the target than?
31
Oct
A fighter plane is flying horizontally at an altitude of 1.5 km with speed 720 km/h. At what angle of sight (w.r.t. horizontal) when the target is seen, should the pilot drop the bomb in order to attack the target than? A fighter plane is flying horizontally at an altitude of 1.5 km with speed [...]
A ball is thrown from a roof top at an angle of 45° above the horizontal. It hits the ground a few seconds later. At what point during its motion, does the ball have . (a) greatest speed (b) smallest speed (c) greatest acceleration Explain.
31
Oct
A ball is thrown from a roof top at an angle of 45° above the horizontal. It hits the ground a few seconds later. At what point during its motion, does the ball have . (a) greatest speed (b) smallest speed (c) greatest acceleration Explain. A ball is thrown from a roof top at an [...]
A cyclist starts from centre O of a circular park of radius 1 km and moves along the path OPRQO as shown in figure. If he maintains constant speed of 10 ms^−1, what is his acceleration at point R in the magnitude and direction ?
31
Oct
A cyclist starts from centre O of a circular park of radius 1 km and moves along the path OPRQO as shown in figure. If he maintains constant speed of 10 ms^−1, what is his acceleration at point R in the magnitude and direction ? A cyclist starts from centre O of a circular park [...]
Following are four different relations about displacement, velocity and acceleration for the motion of a particle in general. Choose the incorrect one (s).
31
Oct
Following are four different relations about displacement, velocity and acceleration for the motion of a particle in general. Choose the incorrect one (s). Following are four different relations about displacement velocity and acceleration for the motion of a particle in general. Choose the incorrect one (s). October 31, 2020 Category: Chapter 3 - Motion in [...]
A particle slides down a frictionless parabolic (y=x^2) track (A−B−C) starting from rest at point A. Point B is at the vertex of parabola and point C is at a height less than that of point A. After C, the particle moves freely in air as a projectile. If the particle reaches highest point at P, then
31
Oct
A particle slides down a frictionless parabolic (y=x^2) track (A−B−C) starting from rest at point A. Point B is at the vertex of parabola and point C is at a height less than that of point A. After C, the particle moves freely in air as a projectile. If the particle reaches highest point at [...]
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A particle slides down a frictionless parabolic (y=x^2) track (A−B−C) starting from rest at point A. Point B is at the vertex of parabola and point C is at a height less than that of point A. After C ,
the particle moves freely in air as a projectile. If the particle reaches highest point at P ,
then ,