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Which of the following is an example of one-dimensional

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A person moves towards east for `3 m`, then towards north for `4 m` and then moves vertically up by `5 m`. What is his distance now from the starting

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The displacement-time graph of two moving particles make angles of 30° and 45° with the X-axis. The ratio of their velocities

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The relation between time and distance is `t=alpha x^2 + betax`, where `alpha and beta` are constants. The retardation

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The `v-t` graph of a moving object is shown in the figure. The maximum acceleration

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Assertion: An object can have constant speed but variable velocity. Reason: SI unit of speed is

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Assertion: An object may have varying speed without having varying velocity. Reason: If the velocity is zero at an instant, the acceleration is zero at that

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Assertion: A body cannot be accelerated, when it is moving uniformly. Reason: When direction of motion of the body changes, then body does not have

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Uniformly Accelerated Motion- The velocity of an object, in general, changes during its course of motion. Initially, at the time of Galileo, it was thought that, this change could be described by the rate of change of velocity with distance. But, through his studies of motion of freely falling objects and motion of objects on an inclined plane, Galileo concluded that, the rate of change of velocity with time is a constant of motion for all objects in free fall.This led to the concept of acceleration as the rate of change of velocity with time. The motion in which the

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Uniformly Accelerated Motion- The velocity of an object, in general, changes during its course of motion. Initially, at the time of Galileo, it was thought that, this change could be described by the rate of change of velocity with distance. But, through his studies of motion of freely falling objects and motion of objects on an inclined plane, Galileo concluded that, the rate of change of velocity with time is a constant of motion for all objects in free fall.This led to the concept of acceleration as the rate of change of velocity with time. The motion in which the

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Two equal vectors have a resultant equal to either of the two. The angle between them

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Suppose a particle moves along a curve shown by the thick line and the positions of particle are represented by `P` at `t` and `P'` at `t'`.where, coordinates of P is `(4, 3) and P' is (7, 6)`. Net displacement of the particle will

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The position of a particle is given by `r= 3t hati + 2t^2 hatj + 5hatk`, then the direction of `v (t)` at `t = 1 s`

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Two stones were projected simultaneously in the same vertical plane from same point obliquely, with different speeds and angles with the horizontal. The trajectory of path followed by one, as seen by the other,

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Two projectiles having different masses `m_1 and m_2` , are projected at an angle `alpha and (90° - alpha)` with the same speed from some point. The ratio of their maximum heights is

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Assertion: Vector addition of two vectors is always greater than their vector subtraction. Reason: At `theta= 90°`, addition and subtraction of vectors are

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Assertion: At highest point of a projectile, dot product of velocity and acceleration is zero. Reason: At highest point, velocity and acceleration are mutually

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A rocket is going upwards with accelerated motion. A man sitting in it feels his weight increased 5 times his own weight. If the mass of the rocket including that of the man is `1.0 xx 10^4 kg`, how much force is being applied by rocket engine? (Take, `g = 10

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A bullet of mass `0.04 kg` moving with a speed of `90 ms^(-1)` enters a heavy wooden block and stopped after `3s`. What is the average resistive force exerted by the block on the

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A constant retarding force of `50 N` is applied to a body of mass `20 kg` moving initially with a speed of `15 ms^(-1)`. How long time does the body take to

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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