Motion in a Pla...

Null vector or a zero vector has a magnitude

A ball is projected horizontally with a velocity of 5 ms^-1 from the top of a building which is 19.6 m high. How long will the ball take to hit the ground?

The velocity-time graph of a moving train is depicted in the figure below. The average velocity during time OD was

From the top of a tower of height 40 m, a ball is projected upwards with a speed of 20 ms^–1 at an angle of 30° with the horizontal. If g = 10 ms^–2, then after how much time will the ball hit the ground?

When a projectile is at the highest point of its trajectory, the directions of its velocity and acceleration are

To find the sum of vectors A and B, we place vector B

Which one of the following statements is NOT true about the motion of a projectile?

A body is projected with a kinetic energy K at an angle of 60° with the horizontal. Its kinetic energy at the highest point of its trajectory will be

It is possible to project a particle with a given velocity in two possible ways, so as to make it pass through a point P at a distant r from the point of projection. The product of the time durations taken to reach this point in the two possible ways is proportional to

If a projectile has the same range R when the maximum height attained by it is either h₁ or h₂, then R, h₁ and h₂ will be related as

The maximum height attained by a projectile is increased by 10% by changing the angle of projection, without changing the speed of projection. The percentage increase in the time of flight will be

A ball is projected vertically upwards with a certain initial speed. Another ball of the same mass is projected at an angle of 60° with the vertical, with the same initial speed. At the highest point, the ratio of their potential energies will be

The graph shows the dependence of velocity on time for a body which is restricted to move in one dimension, along the x-axis. At t = 0, the body is at rest at x = 0.



At t = 60 sec, the body is located at

The addition of vectors and the multiplication of a vector by a scalar together gives rise to

A projectile has a maximum range of 200 m. What is the maximum height attained by it?

At what angle () with the horizontal should a body be projected, so that its horizontal range equals the maximum height it attains?

A projectile has a range R and time of flight T. If the range is doubled (by increasing the speed of projection and without changing the angle of projection), the time of flight will become

Which of the following remains constant during the motion of a projectile fired from a planet?

Vector addition is